Enable more Ruff rules (#7930)

* bump version

* Add more checks

* add simplify rules

* Add RUF rules

* small perf imrpovements

* pylint checks

* more style fixes

* fix a number of A002 cases

* fix A001 cases

* disable unsafe fixes

* remove unneeded branches
fixes SIM102

* re-enable .keys for specific case

* Revert "remove unneeded branches"

This reverts commit f74d41bc07.

* fix reference

.github/scripts/check_js_templates.py

@@ -71,7 +71,7 @@ def check_prohibited_tags(data):
 for filename in pathlib.Path(js_i18n_dir).rglob('*.js'):
     print(f"Checking file 'translated/{os.path.basename(filename)}':")
 
-    with open(filename, 'r') as js_file:
+    with open(filename, encoding='utf-8') as js_file:
         data = js_file.readlines()
 
     errors += check_invalid_tag(data)
@@ -81,7 +81,7 @@ for filename in pathlib.Path(js_dynamic_dir).rglob('*.js'):
     print(f"Checking file 'dynamic/{os.path.basename(filename)}':")
 
     # Check that the 'dynamic' files do not contains any translated strings
-    with open(filename, 'r') as js_file:
+    with open(filename, encoding='utf-8') as js_file:
         data = js_file.readlines()
 
     invalid_tags = ['blocktrans', 'blocktranslate', 'trans', 'translate']

.github/scripts/check_migration_files.py

@@ -20,9 +20,9 @@ for line in str(out.decode()).split('\n'):
 if len(migrations) == 0:
     sys.exit(0)
 
-print('There are {n} unstaged migration files:'.format(n=len(migrations)))
+print(f'There are {len(migrations)} unstaged migration files:')
 
 for m in migrations:
-    print(' - {m}'.format(m=m))
+    print(f' - {m}')
 
 sys.exit(len(migrations))

.github/scripts/version_check.py

@@ -89,7 +89,7 @@ def check_version_number(version_string, allow_duplicate=False):
 
         if release > version_tuple:
             highest_release = False
-            print(f'Found newer release: {str(release)}')
+            print(f'Found newer release: {release!s}')
 
     return highest_release
 
@@ -134,7 +134,7 @@ if __name__ == '__main__':
 
     version = None
 
-    with open(version_file, 'r') as f:
+    with open(version_file, encoding='utf-8') as f:
         text = f.read()
 
         # Extract the InvenTree software version
@@ -175,10 +175,7 @@ if __name__ == '__main__':
             print(f"Version number '{version}' does not match tag '{version_tag}'")
             sys.exit
 
-        if highest_release:
+        docker_tags = [version_tag, 'stable'] if highest_release else [version_tag]
-            docker_tags = [version_tag, 'stable']
-        else:
-            docker_tags = [version_tag]
 
     elif GITHUB_REF_TYPE == 'branch':
         # Otherwise we know we are targeting the 'master' branch
@@ -202,7 +199,7 @@ if __name__ == '__main__':
     target_repos = [REPO.lower(), f'ghcr.io/{REPO.lower()}']
 
     # Ref: https://getridbug.com/python/how-to-set-environment-variables-in-github-actions-using-python/
-    with open(os.getenv('GITHUB_ENV'), 'a') as env_file:
+    with open(os.getenv('GITHUB_ENV'), 'a', encoding='utf-8') as env_file:
         # Construct tag string
         tag_list = [[f'{r}:{t}' for t in docker_tags] for r in target_repos]
         tags = ','.join(itertools.chain(*tag_list))

.pre-commit-config.yaml

@@ -17,17 +17,18 @@ repos:
     -   id: check-yaml
     -   id: mixed-line-ending
 -   repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.5.1
+    rev: v0.6.1
     hooks:
     - id: ruff-format
       args: [--preview]
     - id: ruff
       args: [
         --fix,
+        # --unsafe-fixes,
         --preview
       ]
 -   repo: https://github.com/astral-sh/uv-pre-commit
-    rev: 0.2.13
+    rev: 0.2.37
     hooks:
       - id: pip-compile
         name: pip-compile requirements-dev.in
@@ -77,7 +78,7 @@ repos:
       - "prettier@^2.4.1"
       - "@trivago/prettier-plugin-sort-imports"
 - repo: https://github.com/pre-commit/mirrors-eslint
-  rev: "v9.6.0"
+  rev: "v9.9.0"
   hooks:
   - id: eslint
     additional_dependencies:

docs/ci/check_mkdocs_config.py

@@ -10,7 +10,7 @@ tld = os.path.abspath(os.path.join(here, '..'))
 
 config_file = os.path.join(tld, 'mkdocs.yml')
 
-with open(config_file, 'r') as f:
+with open(config_file, encoding='utf-8') as f:
     data = yaml.load(f, yaml.BaseLoader)
 
     assert data['strict'] == 'true'

docs/docs/hooks.py

@@ -57,7 +57,7 @@ def fetch_rtd_versions():
     versions = sorted(versions, key=lambda x: StrictVersion(x['version']), reverse=True)
 
     # Add "latest" version first
-    if not any((x['title'] == 'latest' for x in versions)):
+    if not any(x['title'] == 'latest' for x in versions):
         versions.insert(
             0,
             {
@@ -70,7 +70,7 @@ def fetch_rtd_versions():
     # Ensure we have the 'latest' version
     current_version = os.environ.get('READTHEDOCS_VERSION', None)
 
-    if current_version and not any((x['title'] == current_version for x in versions)):
+    if current_version and not any(x['title'] == current_version for x in versions):
         versions.append({
             'version': current_version,
             'title': current_version,
@@ -82,7 +82,7 @@ def fetch_rtd_versions():
     print('Discovered the following versions:')
     print(versions)
 
-    with open(output_filename, 'w') as file:
+    with open(output_filename, 'w', encoding='utf-8') as file:
         json.dump(versions, file, indent=2)
 
 
@@ -100,7 +100,7 @@ def get_release_data():
         # Release information has been cached to file
 
         print("Loading release information from 'releases.json'")
-        with open(json_file) as f:
+        with open(json_file, encoding='utf-8') as f:
             return json.loads(f.read())
 
     # Download release information via the GitHub API
@@ -127,7 +127,7 @@ def get_release_data():
         page += 1
 
     # Cache these results to file
-    with open(json_file, 'w') as f:
+    with open(json_file, 'w', encoding='utf-8') as f:
         print("Saving release information to 'releases.json'")
         f.write(json.dumps(releases))
 
@@ -173,7 +173,7 @@ def on_config(config, *args, **kwargs):
         # Add *all* readthedocs related keys
         readthedocs = {}
 
-        for key in os.environ.keys():
+        for key in os.environ:
             if key.startswith('READTHEDOCS_'):
                 k = key.replace('READTHEDOCS_', '').lower()
                 readthedocs[k] = os.environ[key]

docs/extract_schema.py

@@ -46,7 +46,7 @@ def top_level_path(path: str) -> str:
 
     key = path.split('/')[1]
 
-    if key in SPECIAL_PATHS.keys():
+    if key in SPECIAL_PATHS:
         return key
 
     return GENERAL_PATH
@@ -54,9 +54,7 @@ def top_level_path(path: str) -> str:
 
 def generate_schema_file(key: str) -> None:
     """Generate a schema file for the provided key."""
-    description = (
+    description = SPECIAL_PATHS.get(key, 'General API Endpoints')
-        SPECIAL_PATHS[key] if key in SPECIAL_PATHS else 'General API Endpoints'
-    )
 
     output = f"""
     ---
@@ -75,7 +73,7 @@ def generate_schema_file(key: str) -> None:
 
     print('Writing schema file to:', output_file)
 
-    with open(output_file, 'w') as f:
+    with open(output_file, 'w', encoding='utf-8') as f:
         f.write(output)
 
 
@@ -121,7 +119,7 @@ def generate_index_file(version: str):
 
     print('Writing index file to:', output_file)
 
-    with open(output_file, 'w') as f:
+    with open(output_file, 'w', encoding='utf-8') as f:
         f.write(output)
 
 
@@ -173,7 +171,7 @@ def parse_api_file(filename: str):
 
     The intent is to make the API schema easier to peruse on the documentation.
     """
-    with open(filename, 'r') as f:
+    with open(filename, encoding='utf-8') as f:
         data = yaml.safe_load(f)
 
     paths = data['paths']
@@ -213,7 +211,7 @@ def parse_api_file(filename: str):
 
         output_file = os.path.abspath(output_file)
 
-        with open(output_file, 'w') as f:
+        with open(output_file, 'w', encoding='utf-8') as f:
             yaml.dump(output, f)
 
         # Generate a markdown file for the schema

docs/main.py

@@ -16,7 +16,7 @@ global USER_SETTINGS
 here = os.path.dirname(__file__)
 settings_file = os.path.join(here, 'inventree_settings.json')
 
-with open(settings_file, 'r') as sf:
+with open(settings_file, encoding='utf-8') as sf:
     settings = json.load(sf)
 
     GLOBAL_SETTINGS = settings['global']
@@ -27,7 +27,7 @@ def get_repo_url(raw=False):
     """Return the repository URL for the current project."""
     mkdocs_yml = os.path.join(os.path.dirname(__file__), 'mkdocs.yml')
 
-    with open(mkdocs_yml, 'r') as f:
+    with open(mkdocs_yml, encoding='utf-8') as f:
         mkdocs_config = yaml.safe_load(f)
         repo_name = mkdocs_config['repo_name']
 
@@ -47,7 +47,7 @@ def check_link(url) -> bool:
 
     # Keep a local cache file of URLs we have already checked
     if os.path.exists(CACHE_FILE):
-        with open(CACHE_FILE, 'r') as f:
+        with open(CACHE_FILE, encoding='utf-8') as f:
             cache = f.read().splitlines()
 
         if url in cache:
@@ -59,7 +59,7 @@ def check_link(url) -> bool:
         response = requests.head(url, timeout=5000)
         if response.status_code == 200:
             # Update the cache file
-            with open(CACHE_FILE, 'a') as f:
+            with open(CACHE_FILE, 'a', encoding='utf-8') as f:
                 f.write(f'{url}\n')
 
             return True
@@ -177,7 +177,7 @@ def define_env(env):
 
         assert subprocess.call(command, shell=True) == 0
 
-        with open(output, 'r') as f:
+        with open(output, encoding='utf-8') as f:
             content = f.read()
 
         return content
@@ -200,12 +200,13 @@ def define_env(env):
         return assets
 
     @env.macro
-    def includefile(filename: str, title: str, format: str = ''):
+    def includefile(filename: str, title: str, fmt: str = ''):
         """Include a file in the documentation, in a 'collapse' block.
 
         Arguments:
             - filename: The name of the file to include (relative to the top-level directory)
             - title:
+            - fmt:
         """
         here = os.path.dirname(__file__)
         path = os.path.join(here, '..', filename)
@@ -214,11 +215,11 @@ def define_env(env):
         if not os.path.exists(path):
             raise FileNotFoundError(f'Required file {path} does not exist.')
 
-        with open(path, 'r') as f:
+        with open(path, encoding='utf-8') as f:
             content = f.read()
 
         data = f'??? abstract "{title}"\n\n'
-        data += f'    ```{format}\n'
+        data += f'    ```{fmt}\n'
         data += textwrap.indent(content, '    ')
         data += '\n\n'
         data += '    ```\n\n'
@@ -233,15 +234,15 @@ def define_env(env):
             'src', 'backend', 'InvenTree', 'report', 'templates', filename
         )
 
-        return includefile(fn, f'Template: {base}', format='html')
+        return includefile(fn, f'Template: {base}', fmt='html')
 
     @env.macro
     def rendersetting(setting: dict):
         """Render a provided setting object into a table row."""
         name = setting['name']
         description = setting['description']
-        default = setting.get('default', None)
+        default = setting.get('default')
-        units = setting.get('units', None)
+        units = setting.get('units')
 
         return f'| {name} | {description} | {default if default is not None else ""} | {units if units is not None else ""} |'
 

pyproject.toml

@@ -20,13 +20,30 @@ src = ["src/backend/InvenTree"]
 "__init__.py" = ["D104"]
 
 [tool.ruff.lint]
-select = ["A", "B", "C4", "D", "I", "N", "F"]
+select = ["A", "B", "C", "C4", "D", "F", "I", "N", "SIM", "PIE", "PLE", "PLW", "RUF", "UP", "W"]
 # Things that should be enabled in the future:
 # - LOG
 # - DJ # for Django stuff
 # - S # for security stuff (bandit)
 
 ignore = [
+    "PLE1205",
+    # - PLE1205 - Too many arguments for logging format string
+    "PLW2901",
+    # - PLW2901 - Outer {outer_kind} variable {name} overwritten by inner {inner_kind} target
+    "PLW0602","PLW0603","PLW0604",  # global variable things
+    "RUF015",
+    # - RUF015 - Prefer next({iterable}) over single element slice
+    "RUF012",
+    # - RUF012 - Mutable class attributes should be annotated with typing.ClassVar
+    "SIM117",
+    # - SIM117 - Use a single with statement with multiple contexts instead of nested with statements
+    "SIM102",
+    # - SIM102 - Use a single if statement instead of nested if statements
+    "SIM105",
+    # - SIM105 - Use contextlib.suppress({exception}) instead of try-except-pass
+    "C901",
+    # - C901 - function is too complex
     "N999",
     # - N802 - function name should be lowercase
 	"N802",
@@ -42,7 +59,7 @@ ignore = [
     "B904",
 
     # Remove fast
-    "A001", "A002","A003","B018"
+    "A002", "B018"
 ]
 
 [tool.ruff.lint.pydocstyle]

src/backend/InvenTree/InvenTree/admin.py

@@ -104,13 +104,15 @@ class InvenTreeResource(ModelResource):
             attribute = getattr(field, 'attribute', field_name)
 
             # Check if the associated database field is a non-nullable string
-            if db_field := db_fields.get(attribute):
             if (
+                (db_field := db_fields.get(attribute))
+                and (
                     isinstance(db_field, CharField)
                     and db_field.blank
                     and not db_field.null
+                )
+                and column not in self.CONVERT_NULL_FIELDS
             ):
-                    if column not in self.CONVERT_NULL_FIELDS:
                 self.CONVERT_NULL_FIELDS.append(column)
 
         return super().before_import(dataset, using_transactions, dry_run, **kwargs)

src/backend/InvenTree/InvenTree/api.py

@@ -26,7 +26,7 @@ from part.models import Part
 from plugin.serializers import MetadataSerializer
 from users.models import ApiToken
 
-from .email import is_email_configured
+from .helpers_email import is_email_configured
 from .mixins import ListAPI, RetrieveUpdateAPI
 from .status import check_system_health, is_worker_running
 from .version import inventreeApiText
@@ -77,7 +77,7 @@ class LicenseView(APIView):
         # Ensure we do not have any duplicate 'name' values in the list
         for entry in data:
             name = None
-            for key in entry.keys():
+            for key in entry:
                 if key.lower() == 'name':
                     name = entry[key]
                     break
@@ -321,7 +321,6 @@ class BulkDeleteMixin:
         Raises:
             ValidationError: If the deletion should not proceed
         """
-        pass
 
     def filter_delete_queryset(self, queryset, request):
         """Provide custom filtering for the queryset *before* it is deleted.
@@ -398,8 +397,6 @@ class BulkDeleteMixin:
 class ListCreateDestroyAPIView(BulkDeleteMixin, ListCreateAPI):
     """Custom API endpoint which provides BulkDelete functionality in addition to List and Create."""
 
-    ...
-
 
 class APISearchViewSerializer(serializers.Serializer):
     """Serializer for the APISearchView."""

src/backend/InvenTree/InvenTree/apps.py

@@ -125,7 +125,7 @@ class InvenTreeConfig(AppConfig):
         for task in tasks:
             ref_name = f'{task.func.__module__}.{task.func.__name__}'
 
-            if ref_name in existing_tasks.keys():
+            if ref_name in existing_tasks:
                 # This task already exists - update the details if required
                 existing_task = existing_tasks[ref_name]
 

src/backend/InvenTree/InvenTree/config.py

@@ -131,7 +131,7 @@ def load_config_data(set_cache: bool = False) -> map:
 
     cfg_file = get_config_file()
 
-    with open(cfg_file, 'r') as cfg:
+    with open(cfg_file, encoding='utf-8') as cfg:
         data = yaml.safe_load(cfg)
 
     # Set the cache if requested

src/backend/InvenTree/InvenTree/context.py

@@ -1,8 +1,6 @@
-# -*- coding: utf-8 -*-
-
 """Provides extra global data to all templates."""
 
-import InvenTree.email
+import InvenTree.helpers_email
 import InvenTree.ready
 import InvenTree.status
 from generic.states.custom import get_custom_classes
@@ -27,7 +25,7 @@ def health_status(request):
 
     status = {
         'django_q_running': InvenTree.status.is_worker_running(),
-        'email_configured': InvenTree.email.is_email_configured(),
+        'email_configured': InvenTree.helpers_email.is_email_configured(),
     }
 
     # The following keys are required to denote system health
@@ -75,7 +73,7 @@ def user_roles(request):
 
     roles = {}
 
-    for role in RuleSet.get_ruleset_models().keys():
+    for role in RuleSet.get_ruleset_models():
         permissions = {}
 
         for perm in ['view', 'add', 'change', 'delete']:

src/backend/InvenTree/InvenTree/conversion.py

@@ -2,6 +2,7 @@
 
 import logging
 import re
+from typing import Optional
 
 from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
@@ -95,7 +96,7 @@ def from_engineering_notation(value):
     """
     value = str(value).strip()
 
-    pattern = '(\d+)([a-zA-Z]+)(\d+)(.*)'
+    pattern = r'(\d+)([a-zA-Z]+)(\d+)(.*)'
 
     if match := re.match(pattern, value):
         left, prefix, right, suffix = match.groups()
@@ -133,7 +134,7 @@ def convert_value(value, unit):
     return value
 
 
-def convert_physical_value(value: str, unit: str = None, strip_units=True):
+def convert_physical_value(value: str, unit: Optional[str] = None, strip_units=True):
     """Validate that the provided value is a valid physical quantity.
 
     Arguments:
@@ -245,8 +246,4 @@ def is_dimensionless(value):
     if value.units == ureg.dimensionless:
         return True
 
-    if value.to_base_units().units == ureg.dimensionless:
+    return value.to_base_units().units == ureg.dimensionless
-        return True
-
-    # At this point, the value is not dimensionless
-    return False

src/backend/InvenTree/InvenTree/exceptions.py

@@ -1,7 +1,6 @@
 """Custom exception handling for the DRF API."""
 
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 
 import logging
 import sys
@@ -41,10 +40,7 @@ def log_error(path, error_name=None, error_info=None, error_data=None):
     if kind in settings.IGNORED_ERRORS:
         return
 
-    if error_name:
+    kind = error_name or getattr(kind, '__name__', 'Unknown Error')
-        kind = error_name
-    else:
-        kind = getattr(kind, '__name__', 'Unknown Error')
 
     if error_info:
         info = error_info

src/backend/InvenTree/InvenTree/exchange.py

@@ -31,10 +31,7 @@ class InvenTreeExchange(SimpleExchangeBackend):
         # Find the selected exchange rate plugin
         slug = get_global_setting('CURRENCY_UPDATE_PLUGIN', create=False)
 
-        if slug:
+        plugin = registry.get_plugin(slug) if slug else None
-            plugin = registry.get_plugin(slug)
-        else:
-            plugin = None
 
         if not plugin:
             # Find the first active currency exchange plugin

src/backend/InvenTree/InvenTree/fields.py

@@ -93,8 +93,7 @@ class InvenTreeModelMoneyField(ModelMoneyField):
         allow_negative = kwargs.pop('allow_negative', False)
 
         # If no validators are provided, add some "standard" ones
-        if len(validators) == 0:
+        if len(validators) == 0 and not allow_negative:
-            if not allow_negative:
             validators.append(MinMoneyValidator(0))
 
         kwargs['validators'] = validators

src/backend/InvenTree/InvenTree/filters.py

@@ -118,10 +118,7 @@ class InvenTreeOrderingFilter(filters.OrderingFilter):
                     field = field[1:]
 
                 # Are aliases defined for this field?
-                if field in aliases:
+                alias = aliases.get(field, field)
-                    alias = aliases[field]
-                else:
-                    alias = field
 
                 """
                 Potentially, a single field could be "aliased" to multiple field,

src/backend/InvenTree/InvenTree/format.py

@@ -2,6 +2,7 @@
 
 import re
 import string
+from typing import Optional
 
 from django.conf import settings
 from django.utils import translation
@@ -106,10 +107,7 @@ def construct_format_regex(fmt_string: str) -> str:
         # Add a named capture group for the format entry
         if name:
             # Check if integer values are required
-            if _fmt.endswith('d'):
+            c = '\\d' if _fmt.endswith('d') else '.'
-                c = '\d'
-            else:
-                c = '.'
 
             # Specify width
             # TODO: Introspect required width
@@ -160,7 +158,7 @@ def extract_named_group(name: str, value: str, fmt_string: str) -> str:
     """
     info = parse_format_string(fmt_string)
 
-    if name not in info.keys():
+    if name not in info:
         raise NameError(_(f"Value '{name}' does not appear in pattern format"))
 
     # Construct a regular expression for matching against the provided format string
@@ -182,8 +180,8 @@ def extract_named_group(name: str, value: str, fmt_string: str) -> str:
 
 def format_money(
     money: Money,
-    decimal_places: int = None,
+    decimal_places: Optional[int] = None,
-    format: str = None,
+    fmt: Optional[str] = None,
     include_symbol: bool = True,
 ) -> str:
     """Format money object according to the currently set local.
@@ -191,7 +189,7 @@ def format_money(
     Args:
         money (Money): The money object to format
         decimal_places (int): Number of decimal places to use
-        format (str): Format pattern according LDML / the babel format pattern syntax (https://babel.pocoo.org/en/latest/numbers.html)
+        fmt (str): Format pattern according LDML / the babel format pattern syntax (https://babel.pocoo.org/en/latest/numbers.html)
 
     Returns:
         str: The formatted string
@@ -199,10 +197,10 @@ def format_money(
     Raises:
         ValueError: format string is incorrectly specified
     """
-    language = None and translation.get_language() or settings.LANGUAGE_CODE
+    language = (None) or settings.LANGUAGE_CODE
     locale = Locale.parse(translation.to_locale(language))
-    if format:
+    if fmt:
-        pattern = parse_pattern(format)
+        pattern = parse_pattern(fmt)
     else:
         pattern = locale.currency_formats['standard']
         if decimal_places is not None:

src/backend/InvenTree/InvenTree/forms.py

@@ -266,8 +266,7 @@ class RegistratonMixin:
                 raise forms.ValidationError(
                     _('The provided primary email address is not valid.')
                 )
-            else:
+            elif split_email[1] == option[1:]:
-                if split_email[1] == option[1:]:
                 return super().clean_email(email)
 
         logger.info('The provided email domain for %s is not approved', email)

src/backend/InvenTree/InvenTree/helpers.py

@@ -9,15 +9,15 @@ import os.path
 import re
 from decimal import Decimal, InvalidOperation
 from pathlib import Path
-from typing import TypeVar, Union
+from typing import Optional, TypeVar, Union
 from wsgiref.util import FileWrapper
 
-import django.utils.timezone as timezone
 from django.conf import settings
 from django.contrib.staticfiles.storage import StaticFilesStorage
 from django.core.exceptions import FieldError, ValidationError
 from django.core.files.storage import Storage, default_storage
 from django.http import StreamingHttpResponse
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
 import pytz
@@ -97,10 +97,7 @@ def generateTestKey(test_name: str) -> str:
         if char.isidentifier():
             return True
 
-        if char.isalnum():
+        return bool(char.isalnum())
-            return True
-
-        return False
 
     # Remove any characters that cannot be used to represent a variable
     key = ''.join([c for c in key if valid_char(c)])
@@ -490,10 +487,7 @@ def extract_serial_numbers(input_string, expected_quantity: int, starting_value=
     except ValueError:
         raise ValidationError([_('Invalid quantity provided')])
 
-    if input_string:
+    input_string = str(input_string).strip() if input_string else ''
-        input_string = str(input_string).strip()
-    else:
-        input_string = ''
 
     if len(input_string) == 0:
         raise ValidationError([_('Empty serial number string')])
@@ -800,10 +794,10 @@ def remove_non_printable_characters(
     if remove_unicode:
         # Remove Unicode control characters
         if remove_newline:
-            cleaned = regex.sub('[^\P{C}]+', '', cleaned)
+            cleaned = regex.sub(r'[^\P{C}]+', '', cleaned)
         else:
             # Use 'negative-lookahead' to exclude newline character
-            cleaned = regex.sub('(?![\x0a])[^\P{C}]+', '', cleaned)
+            cleaned = regex.sub('(?![\x0a])[^\\P{C}]+', '', cleaned)
 
     return cleaned
 
@@ -827,7 +821,7 @@ def hash_barcode(barcode_data):
 def hash_file(filename: Union[str, Path], storage: Union[Storage, None] = None):
     """Return the MD5 hash of a file."""
     content = (
-        open(filename, 'rb').read()
+        open(filename, 'rb').read()  # noqa: SIM115
         if storage is None
         else storage.open(str(filename), 'rb').read()
     )
@@ -865,7 +859,7 @@ def server_timezone() -> str:
     return settings.TIME_ZONE
 
 
-def to_local_time(time, target_tz: str = None):
+def to_local_time(time, target_tz: Optional[str] = None):
     """Convert the provided time object to the local timezone.
 
     Arguments:

src/backend/InvenTree/InvenTree/helpers_email.py

@@ -62,7 +62,7 @@ def send_email(subject, body, recipients, from_email=None, html_message=None):
         # If we are importing data, don't send emails
         return
 
-    if not InvenTree.email.is_email_configured() and not settings.TESTING:
+    if not is_email_configured() and not settings.TESTING:
         # Email is not configured / enabled
         return
 

src/backend/InvenTree/InvenTree/helpers_model.py

@@ -114,10 +114,7 @@ def download_image_from_url(remote_url, timeout=2.5):
     # Add user specified user-agent to request (if specified)
     user_agent = get_global_setting('INVENTREE_DOWNLOAD_FROM_URL_USER_AGENT')
 
-    if user_agent:
+    headers = {'User-Agent': user_agent} if user_agent else None
-        headers = {'User-Agent': user_agent}
-    else:
-        headers = None
 
     try:
         response = requests.get(
@@ -130,7 +127,7 @@ def download_image_from_url(remote_url, timeout=2.5):
         # Throw an error if anything goes wrong
         response.raise_for_status()
     except requests.exceptions.ConnectionError as exc:
-        raise Exception(_('Connection error') + f': {str(exc)}')
+        raise Exception(_('Connection error') + f': {exc!s}')
     except requests.exceptions.Timeout as exc:
         raise exc
     except requests.exceptions.HTTPError:
@@ -138,7 +135,7 @@ def download_image_from_url(remote_url, timeout=2.5):
             _('Server responded with invalid status code') + f': {response.status_code}'
         )
     except Exception as exc:
-        raise Exception(_('Exception occurred') + f': {str(exc)}')
+        raise Exception(_('Exception occurred') + f': {exc!s}')
 
     if response.status_code != 200:
         raise Exception(

src/backend/InvenTree/InvenTree/management/commands/export_settings_definitions.py

@@ -47,7 +47,7 @@ class Command(BaseCommand):
 
         filename = kwargs.get('filename', 'inventree_settings.json')
 
-        with open(filename, 'w') as f:
+        with open(filename, 'w', encoding='utf-8') as f:
             json.dump(settings, f, indent=4)
 
         print(f"Exported InvenTree settings definitions to '{filename}'")

src/backend/InvenTree/InvenTree/management/commands/migrate_icons.py

@@ -103,14 +103,14 @@ class Command(BaseCommand):
                         })
 
             self.stdout.write(f'Writing icon map for {len(icons.keys())} icons')
-            with open(kwargs['output_file'], 'w') as f:
+            with open(kwargs['output_file'], 'w', encoding='utf-8') as f:
                 json.dump(icons, f, indent=2)
 
             self.stdout.write(f'Icon map written to {kwargs["output_file"]}')
 
         # Import icon map file
         if kwargs['input_file']:
-            with open(kwargs['input_file'], 'r') as f:
+            with open(kwargs['input_file'], encoding='utf-8') as f:
                 icons = json.load(f)
 
             self.stdout.write(f'Loaded icon map for {len(icons.keys())} icons')

src/backend/InvenTree/InvenTree/management/commands/prerender.py

@@ -19,8 +19,9 @@ def render_file(file_name, source, target, locales, ctx):
 
         target_file = os.path.join(target, locale + '.' + file_name)
 
-        with open(target_file, 'w') as localised_file:
+        with open(target_file, 'w', encoding='utf-8') as localised_file, lang_over(
-            with lang_over(locale):
+            locale
+        ):
             rendered = render_to_string(os.path.join(source, file_name), ctx)
             localised_file.write(rendered)
 

src/backend/InvenTree/InvenTree/management/commands/rebuild_thumbnails.py

@@ -35,7 +35,7 @@ class Command(BaseCommand):
                 img_paths.append(x.path)
 
         if len(img_paths) > 0:
-            if all((os.path.exists(path) for path in img_paths)):
+            if all(os.path.exists(path) for path in img_paths):
                 # All images exist - skip further work
                 return
 

src/backend/InvenTree/InvenTree/management/commands/remove_mfa.py

@@ -35,4 +35,4 @@ class Command(BaseCommand):
             mfa_user[0].staticdevice_set.all().delete()
             # TOTP tokens
             mfa_user[0].totpdevice_set.all().delete()
-            print(f'Removed all MFA methods for user {str(mfa_user[0])}')
+            print(f'Removed all MFA methods for user {mfa_user[0]!s}')

src/backend/InvenTree/InvenTree/metadata.py

@@ -204,7 +204,7 @@ class InvenTreeMetadata(SimpleMetadata):
 
             # Iterate through simple fields
             for name, field in model_fields.fields.items():
-                if name in serializer_info.keys():
+                if name in serializer_info:
                     if name in read_only_fields:
                         serializer_info[name]['read_only'] = True
 
@@ -236,7 +236,7 @@ class InvenTreeMetadata(SimpleMetadata):
 
             # Iterate through relations
             for name, relation in model_fields.relations.items():
-                if name not in serializer_info.keys():
+                if name not in serializer_info:
                     # Skip relation not defined in serializer
                     continue
 
@@ -307,12 +307,12 @@ class InvenTreeMetadata(SimpleMetadata):
                 instance_filters = instance.api_instance_filters()
 
                 for field_name, field_filters in instance_filters.items():
-                    if field_name not in serializer_info.keys():
+                    if field_name not in serializer_info:
                         # The field might be missing, but is added later on
                         # This function seems to get called multiple times?
                         continue
 
-                    if 'instance_filters' not in serializer_info[field_name].keys():
+                    if 'instance_filters' not in serializer_info[field_name]:
                         serializer_info[field_name]['instance_filters'] = {}
 
                     for key, value in field_filters.items():

src/backend/InvenTree/InvenTree/middleware.py

@@ -36,7 +36,7 @@ def get_token_from_request(request):
     return None
 
 
-class AuthRequiredMiddleware(object):
+class AuthRequiredMiddleware:
     """Check for user to be authenticated."""
 
     def __init__(self, get_response):
@@ -92,23 +92,18 @@ class AuthRequiredMiddleware(object):
 
             # Allow static files to be accessed without auth
             # Important for e.g. login page
-            if request.path_info.startswith('/static/'):
+            if (
-                authorized = True
+                request.path_info.startswith('/static/')
-
+                or request.path_info.startswith('/accounts/')
-            # Unauthorized users can access the login page
+                or (
-            elif request.path_info.startswith('/accounts/'):
-                authorized = True
-
-            elif (
                     request.path_info.startswith(f'/{settings.FRONTEND_URL_BASE}/')
                     or request.path_info.startswith('/assets/')
                     or request.path_info == f'/{settings.FRONTEND_URL_BASE}'
+                )
+                or self.check_token(request)
             ):
                 authorized = True
 
-            elif self.check_token(request):
-                authorized = True
-
             # No authorization was found for the request
             if not authorized:
                 path = request.path_info

src/backend/InvenTree/InvenTree/mixins.py

@@ -128,14 +128,10 @@ class CreateAPI(CleanMixin, generics.CreateAPIView):
 class RetrieveAPI(generics.RetrieveAPIView):
     """View for retrieve API."""
 
-    pass
-
 
 class RetrieveUpdateAPI(CleanMixin, generics.RetrieveUpdateAPIView):
     """View for retrieve and update API."""
 
-    pass
-
 
 class CustomDestroyModelMixin:
     """This mixin was created pass the kwargs from the API to the models."""

src/backend/InvenTree/InvenTree/models.py

@@ -390,10 +390,7 @@ class ReferenceIndexingMixin(models.Model):
             except Exception:
                 # If anything goes wrong, return the most recent reference
                 recent = cls.get_most_recent_item()
-                if recent:
+                reference = recent.reference if recent else ''
-                    reference = recent.reference
-                else:
-                    reference = ''
 
         return reference
 
@@ -410,14 +407,14 @@ class ReferenceIndexingMixin(models.Model):
             })
 
         # Check that only 'allowed' keys are provided
-        for key in info.keys():
+        for key in info:
-            if key not in ctx.keys():
+            if key not in ctx:
                 raise ValidationError({
                     'value': _('Unknown format key specified') + f": '{key}'"
                 })
 
         # Check that the 'ref' variable is specified
-        if 'ref' not in info.keys():
+        if 'ref' not in info:
             raise ValidationError({
                 'value': _('Missing required format key') + ": 'ref'"
             })
@@ -859,7 +856,7 @@ class InvenTreeTree(MetadataMixin, PluginValidationMixin, MPTTModel):
         Returns:
             List of category names from the top level to this category
         """
-        return self.parentpath + [self]
+        return [*self.parentpath, self]
 
     def get_path(self):
         """Return a list of element in the item tree.
@@ -1099,4 +1096,4 @@ def after_error_logged(sender, instance: Error, created: bool, **kwargs):
 
         except Exception as exc:
             """We do not want to throw an exception while reporting an exception"""
-            logger.error(exc)  # noqa: LOG005
+            logger.error(exc)

src/backend/InvenTree/InvenTree/permissions.py

@@ -105,8 +105,7 @@ class IsStaffOrReadOnly(permissions.IsAdminUser):
     def has_permission(self, request, view):
         """Check if the user is a superuser."""
         return bool(
-            request.user
+            (request.user and request.user.is_staff)
-            and request.user.is_staff
             or request.method in permissions.SAFE_METHODS
         )
 

src/backend/InvenTree/InvenTree/ready.py

@@ -11,33 +11,28 @@ def isInTestMode():
 
 def isImportingData():
     """Returns True if the database is currently importing (or exporting) data, e.g. 'loaddata' command is performed."""
-    return any((x in sys.argv for x in ['flush', 'loaddata', 'dumpdata']))
+    return any(x in sys.argv for x in ['flush', 'loaddata', 'dumpdata'])
 
 
 def isRunningMigrations():
     """Return True if the database is currently running migrations."""
     return any(
-        (
         x in sys.argv
         for x in ['migrate', 'makemigrations', 'showmigrations', 'runmigrations']
     )
-    )
 
 
 def isRebuildingData():
     """Return true if any of the rebuilding commands are being executed."""
     return any(
-        (
         x in sys.argv
         for x in ['prerender', 'rebuild_models', 'rebuild_thumbnails', 'rebuild']
     )
-    )
 
 
 def isRunningBackup():
     """Return true if any of the backup commands are being executed."""
     return any(
-        (
         x in sys.argv
         for x in [
             'backup',
@@ -48,7 +43,6 @@ def isRunningBackup():
             'mediarestore',
         ]
     )
-    )
 
 
 def isInWorkerThread():
@@ -64,10 +58,7 @@ def isInServerThread():
     if 'runserver' in sys.argv:
         return True
 
-    if 'gunicorn' in sys.argv[0]:
+    return 'gunicorn' in sys.argv[0]
-        return True
-
-    return False
 
 
 def isInMainThread():
@@ -128,11 +119,7 @@ def canAppAccessDatabase(
     if not allow_plugins:
         excluded_commands.extend(['collectplugins'])
 
-    for cmd in excluded_commands:
+    return all(cmd not in sys.argv for cmd in excluded_commands)
-        if cmd in sys.argv:
-            return False
-
-    return True
 
 
 def isPluginRegistryLoaded():

src/backend/InvenTree/InvenTree/serializers.py

@@ -89,7 +89,7 @@ class InvenTreeCurrencySerializer(serializers.ChoiceField):
         )
 
         if allow_blank:
-            choices = [('', '---------')] + choices
+            choices = [('', '---------'), *choices]
 
         kwargs['choices'] = choices
 
@@ -379,7 +379,7 @@ class InvenTreeTaggitSerializer(TaggitSerializer):
 
         tag_object = super().update(instance, validated_data)
 
-        for key in to_be_tagged.keys():
+        for key in to_be_tagged:
             # re-add the tagmanager
             new_tagobject = tag_object.__class__.objects.get(id=tag_object.id)
             setattr(tag_object, key, getattr(new_tagobject, key))
@@ -390,8 +390,6 @@ class InvenTreeTaggitSerializer(TaggitSerializer):
 class InvenTreeTagModelSerializer(InvenTreeTaggitSerializer, InvenTreeModelSerializer):
     """Combination of InvenTreeTaggitSerializer and InvenTreeModelSerializer."""
 
-    pass
-
 
 class UserSerializer(InvenTreeModelSerializer):
     """Serializer for a User."""
@@ -426,14 +424,15 @@ class ExendedUserSerializer(UserSerializer):
     class Meta(UserSerializer.Meta):
         """Metaclass defines serializer fields."""
 
-        fields = UserSerializer.Meta.fields + [
+        fields = [
+            *UserSerializer.Meta.fields,
             'groups',
             'is_staff',
             'is_superuser',
             'is_active',
         ]
 
-        read_only_fields = UserSerializer.Meta.read_only_fields + ['groups']
+        read_only_fields = [*UserSerializer.Meta.read_only_fields, 'groups']
 
     is_staff = serializers.BooleanField(
         label=_('Staff'), help_text=_('Does this user have staff permissions')
@@ -704,7 +703,6 @@ class DataFileUploadSerializer(serializers.Serializer):
 
     def save(self):
         """Empty overwrite for save."""
-        ...
 
 
 class DataFileExtractSerializer(serializers.Serializer):
@@ -806,8 +804,7 @@ class DataFileExtractSerializer(serializers.Serializer):
             required = field.get('required', False)
 
             # Check for missing required columns
-            if required:
+            if required and name not in self.columns:
-                if name not in self.columns:
                 raise serializers.ValidationError(
                     _(f"Missing required column: '{name}'")
                 )
@@ -824,7 +821,6 @@ class DataFileExtractSerializer(serializers.Serializer):
 
     def save(self):
         """No "save" action for this serializer."""
-        pass
 
 
 class NotesFieldMixin:

src/backend/InvenTree/InvenTree/settings.py

@@ -281,7 +281,7 @@ QUERYCOUNT = {
         'MIN_TIME_TO_LOG': 0.1,
         'MIN_QUERY_COUNT_TO_LOG': 25,
     },
-    'IGNORE_REQUEST_PATTERNS': ['^(?!\/(api)?(plugin)?\/).*'],
+    'IGNORE_REQUEST_PATTERNS': [r'^(?!\/(api)?(plugin)?\/).*'],
     'IGNORE_SQL_PATTERNS': [],
     'DISPLAY_DUPLICATES': 1,
     'RESPONSE_HEADER': 'X-Django-Query-Count',
@@ -298,7 +298,7 @@ if (
     and INVENTREE_ADMIN_ENABLED
     and not TESTING
     and get_boolean_setting('INVENTREE_DEBUG_SHELL', 'debug_shell', False)
-):  # noqa
+):
     try:
         import django_admin_shell  # noqa: F401
 
@@ -949,10 +949,7 @@ USE_I18N = True
 
 # Do not use native timezone support in "test" mode
 # It generates a *lot* of cruft in the logs
-if not TESTING:
+USE_TZ = bool(not TESTING)
-    USE_TZ = True  # pragma: no cover
-else:
-    USE_TZ = False
 
 DATE_INPUT_FORMATS = ['%Y-%m-%d']
 
@@ -1065,7 +1062,7 @@ COOKIE_MODE = (
 
 valid_cookie_modes = {'lax': 'Lax', 'strict': 'Strict', 'none': None, 'null': None}
 
-if COOKIE_MODE not in valid_cookie_modes.keys():
+if COOKIE_MODE not in valid_cookie_modes:
     logger.error('Invalid cookie samesite mode: %s', COOKIE_MODE)
     sys.exit(-1)
 

src/backend/InvenTree/InvenTree/social_auth_urls.py

@@ -94,8 +94,7 @@ for name, provider in providers.registry.provider_map.items():
     urls = []
     if len(adapters) == 1:
         urls = handle_oauth2(adapter=adapters[0])
-    else:
+    elif provider.id in legacy:
-        if provider.id in legacy:
         logger.warning(
             '`%s` is not supported on platform UI. Use `%s` instead.',
             provider.id,

src/backend/InvenTree/InvenTree/status.py

@@ -1,5 +1,4 @@
 """Provides system status functionality checks."""
-# -*- coding: utf-8 -*-
 
 import logging
 from datetime import timedelta
@@ -10,7 +9,7 @@ from django.utils.translation import gettext_lazy as _
 from django_q.models import Success
 from django_q.status import Stat
 
-import InvenTree.email
+import InvenTree.helpers_email
 import InvenTree.ready
 
 logger = logging.getLogger('inventree')
@@ -65,7 +64,7 @@ def check_system_health(**kwargs):
         result = False
         logger.warning(_('Background worker check failed'))
 
-    if not InvenTree.email.is_email_configured():  # pragma: no cover
+    if not InvenTree.helpers_email.is_email_configured():  # pragma: no cover
         result = False
         logger.warning(_('Email backend not configured'))
 

src/backend/InvenTree/InvenTree/tasks.py

@@ -9,7 +9,7 @@ import time
 import warnings
 from dataclasses import dataclass
 from datetime import datetime, timedelta
-from typing import Callable
+from typing import Callable, Optional
 
 from django.conf import settings
 from django.core.exceptions import AppRegistryNotReady
@@ -206,7 +206,7 @@ def offload_task(
             raise_warning(f"WARNING: '{taskname}' not offloaded - Function not found")
             return False
         except Exception as exc:
-            raise_warning(f"WARNING: '{taskname}' not offloaded due to {str(exc)}")
+            raise_warning(f"WARNING: '{taskname}' not offloaded due to {exc!s}")
             log_error('InvenTree.offload_task')
             return False
     else:
@@ -256,7 +256,7 @@ def offload_task(
             _func(*args, **kwargs)
         except Exception as exc:
             log_error('InvenTree.offload_task')
-            raise_warning(f"WARNING: '{taskname}' failed due to {str(exc)}")
+            raise_warning(f"WARNING: '{taskname}' failed due to {exc!s}")
             raise exc
 
     # Finally, task either completed successfully or was offloaded
@@ -291,7 +291,7 @@ class TaskRegister:
 
     task_list: list[ScheduledTask] = []
 
-    def register(self, task, schedule, minutes: int = None):
+    def register(self, task, schedule, minutes: Optional[int] = None):
         """Register a task with the que."""
         self.task_list.append(ScheduledTask(task, schedule, minutes))
 
@@ -299,7 +299,9 @@ class TaskRegister:
 tasks = TaskRegister()
 
 
-def scheduled_task(interval: str, minutes: int = None, tasklist: TaskRegister = None):
+def scheduled_task(
+    interval: str, minutes: Optional[int] = None, tasklist: TaskRegister = None
+):
     """Register the given task as a scheduled task.
 
     Example:

src/backend/InvenTree/InvenTree/templatetags/i18n.py

@@ -80,7 +80,7 @@ def do_translate(parser, token):
     """
     bits = token.split_contents()
     if len(bits) < 2:
-        raise TemplateSyntaxError("'%s' takes at least one argument" % bits[0])
+        raise TemplateSyntaxError(f"'{bits[0]}' takes at least one argument")
     message_string = parser.compile_filter(bits[1])
     remaining = bits[2:]
 
@@ -95,7 +95,7 @@ def do_translate(parser, token):
         option = remaining.pop(0)
         if option in seen:
             raise TemplateSyntaxError(
-                "The '%s' option was specified more than once." % option
+                f"The '{option}' option was specified more than once."
             )
         elif option == 'noop':
             noop = True
@@ -104,13 +104,12 @@ def do_translate(parser, token):
                 value = remaining.pop(0)
             except IndexError:
                 raise TemplateSyntaxError(
-                    "No argument provided to the '%s' tag for the context option."
+                    f"No argument provided to the '{bits[0]}' tag for the context option."
-                    % bits[0]
                 )
             if value in invalid_context:
                 raise TemplateSyntaxError(
-                    "Invalid argument '%s' provided to the '%s' tag for the context "
+                    f"Invalid argument '{value}' provided to the '{bits[0]}' tag for the context "
-                    'option' % (value, bits[0])
+                    'option'
                 )
             message_context = parser.compile_filter(value)
         elif option == 'as':
@@ -118,16 +117,15 @@ def do_translate(parser, token):
                 value = remaining.pop(0)
             except IndexError:
                 raise TemplateSyntaxError(
-                    "No argument provided to the '%s' tag for the as option." % bits[0]
+                    f"No argument provided to the '{bits[0]}' tag for the as option."
                 )
             asvar = value
         elif option == 'escape':
             escape = True
         else:
             raise TemplateSyntaxError(
-                "Unknown argument for '%s' tag: '%s'. The only options "
+                f"Unknown argument for '{bits[0]}' tag: '{option}'. The only options "
                 "available are 'noop', 'context' \"xxx\", and 'as VAR'."
-                % (bits[0], option)
             )
         seen.add(option)
 

src/backend/InvenTree/InvenTree/templatetags/inventree_extras.py

@@ -410,10 +410,7 @@ def progress_bar(val, max_val, *args, **kwargs):
     else:
         style = ''
 
-    if max_val != 0:
+    percent = float(val / max_val) * 100 if max_val != 0 else 0
-        percent = float(val / max_val) * 100
-    else:
-        percent = 0
 
     if percent > 100:
         percent = 100
@@ -498,7 +495,7 @@ def primitive_to_javascript(primitive):
     elif type(primitive) in [int, float]:
         return primitive
     # Wrap with quotes
-    return format_html("'{}'", primitive)  # noqa: P103
+    return format_html("'{}'", primitive)
 
 
 @register.simple_tag()

src/backend/InvenTree/InvenTree/test_api.py

@@ -70,11 +70,11 @@ class APITests(InvenTreeAPITestCase):
         """Helper function to use basic auth."""
         # Use basic authentication
 
-        authstring = bytes('{u}:{p}'.format(u=self.username, p=self.password), 'ascii')
+        authstring = bytes(f'{self.username}:{self.password}', 'ascii')
 
         # Use "basic" auth by default
         auth = b64encode(authstring).decode('ascii')
-        self.client.credentials(HTTP_AUTHORIZATION='Basic {auth}'.format(auth=auth))
+        self.client.credentials(HTTP_AUTHORIZATION=f'Basic {auth}')
 
     def tokenAuth(self):
         """Helper function to use token auth."""

src/backend/InvenTree/InvenTree/test_urls.py

@@ -70,7 +70,7 @@ class URLTest(TestCase):
 
         pattern = '{% url [\'"]([^\'"]+)[\'"]([^%]*)%}'
 
-        with open(input_file, 'r') as f:
+        with open(input_file, encoding='utf-8') as f:
             data = f.read()
 
             results = re.findall(pattern, data)

src/backend/InvenTree/InvenTree/tests.py

@@ -543,22 +543,22 @@ class FormatTest(TestCase):
     def test_currency_formatting(self):
         """Test that currency formatting works correctly for multiple currencies."""
         test_data = (
-            (Money(3651.285718, 'USD'), 4, True, '$3,651.2857'),  # noqa: E201,E202
+            (Money(3651.285718, 'USD'), 4, True, '$3,651.2857'),
-            (Money(487587.849178, 'CAD'), 5, True, 'CA$487,587.84918'),  # noqa: E201,E202
+            (Money(487587.849178, 'CAD'), 5, True, 'CA$487,587.84918'),
-            (Money(0.348102, 'EUR'), 1, False, '0.3'),  # noqa: E201,E202
+            (Money(0.348102, 'EUR'), 1, False, '0.3'),
-            (Money(0.916530, 'GBP'), 1, True, '£0.9'),  # noqa: E201,E202
+            (Money(0.916530, 'GBP'), 1, True, '£0.9'),
-            (Money(61.031024, 'JPY'), 3, False, '61.031'),  # noqa: E201,E202
+            (Money(61.031024, 'JPY'), 3, False, '61.031'),
-            (Money(49609.694602, 'JPY'), 1, True, '¥49,609.7'),  # noqa: E201,E202
+            (Money(49609.694602, 'JPY'), 1, True, '¥49,609.7'),
-            (Money(155565.264777, 'AUD'), 2, False, '155,565.26'),  # noqa: E201,E202
+            (Money(155565.264777, 'AUD'), 2, False, '155,565.26'),
-            (Money(0.820437, 'CNY'), 4, True, 'CN¥0.8204'),  # noqa: E201,E202
+            (Money(0.820437, 'CNY'), 4, True, 'CN¥0.8204'),
-            (Money(7587.849178, 'EUR'), 0, True, '€7,588'),  # noqa: E201,E202
+            (Money(7587.849178, 'EUR'), 0, True, '€7,588'),
-            (Money(0.348102, 'GBP'), 3, False, '0.348'),  # noqa: E201,E202
+            (Money(0.348102, 'GBP'), 3, False, '0.348'),
-            (Money(0.652923, 'CHF'), 0, True, 'CHF1'),  # noqa: E201,E202
+            (Money(0.652923, 'CHF'), 0, True, 'CHF1'),
-            (Money(0.820437, 'CNY'), 1, True, 'CN¥0.8'),  # noqa: E201,E202
+            (Money(0.820437, 'CNY'), 1, True, 'CN¥0.8'),
-            (Money(98789.5295680, 'CHF'), 0, False, '98,790'),  # noqa: E201,E202
+            (Money(98789.5295680, 'CHF'), 0, False, '98,790'),
-            (Money(0.585787, 'USD'), 1, True, '$0.6'),  # noqa: E201,E202
+            (Money(0.585787, 'USD'), 1, True, '$0.6'),
-            (Money(0.690541, 'CAD'), 3, True, 'CA$0.691'),  # noqa: E201,E202
+            (Money(0.690541, 'CAD'), 3, True, 'CA$0.691'),
-            (Money(427.814104, 'AUD'), 5, True, 'A$427.81410'),  # noqa: E201,E202
+            (Money(427.814104, 'AUD'), 5, True, 'A$427.81410'),
         )
 
         with self.settings(LANGUAGE_CODE='en-us'):
@@ -794,7 +794,7 @@ class TestDownloadFile(TestCase):
     def test_download(self):
         """Tests for DownloadFile."""
         helpers.DownloadFile('hello world', 'out.txt')
-        helpers.DownloadFile(bytes(b'hello world'), 'out.bin')
+        helpers.DownloadFile(b'hello world', 'out.bin')
 
 
 class TestMPTT(TestCase):
@@ -1033,12 +1033,12 @@ class TestVersionNumber(TestCase):
 
         # Check that the current .git values work too
 
-        hash = str(
+        git_hash = str(
             subprocess.check_output('git rev-parse --short HEAD'.split()), 'utf-8'
         ).strip()
 
         # On some systems the hash is a different length, so just check the first 6 characters
-        self.assertEqual(hash[:6], version.inventreeCommitHash()[:6])
+        self.assertEqual(git_hash[:6], version.inventreeCommitHash()[:6])
 
         d = (
             str(subprocess.check_output('git show -s --format=%ci'.split()), 'utf-8')
@@ -1438,8 +1438,8 @@ class BarcodeMixinTest(InvenTreeTestCase):
             '{"part": 17, "stockitem": 12}': 'c88c11ed0628eb7fef0d59b098b96975',
         }
 
-        for barcode, hash in hashing_tests.items():
+        for barcode, expected in hashing_tests.items():
-            self.assertEqual(InvenTree.helpers.hash_barcode(barcode), hash)
+            self.assertEqual(InvenTree.helpers.hash_barcode(barcode), expected)
 
 
 class SanitizerTest(TestCase):
@@ -1557,15 +1557,12 @@ class ClassValidationMixinTest(TestCase):
 
         def test(self):
             """Test function."""
-            ...
 
         def test1(self):
             """Test function."""
-            ...
 
         def test2(self):
             """Test function."""
-            ...
 
         required_attributes = ['NAME']
         required_overrides = [test, [test1, test2]]
@@ -1573,8 +1570,6 @@ class ClassValidationMixinTest(TestCase):
     class InvalidClass:
         """An invalid class that does not inherit from ClassValidationMixin."""
 
-        pass
-
     def test_valid_class(self):
         """Test that a valid class passes the validation."""
 
@@ -1585,11 +1580,9 @@ class ClassValidationMixinTest(TestCase):
 
             def test(self):
                 """Test function."""
-                ...
 
             def test2(self):
                 """Test function."""
-                ...
 
         TestClass.validate()
 
@@ -1612,7 +1605,6 @@ class ClassValidationMixinTest(TestCase):
 
             def test2(self):
                 """Test function."""
-                ...
 
         with self.assertRaisesRegex(
             NotImplementedError,
@@ -1627,8 +1619,6 @@ class ClassProviderMixinTest(TestCase):
     class TestClass(ClassProviderMixin):
         """This class is a dummy class to test the ClassProviderMixin."""
 
-        pass
-
     def test_get_provider_file(self):
         """Test the get_provider_file function."""
         self.assertEqual(self.TestClass.get_provider_file(), __file__)

src/backend/InvenTree/InvenTree/translation.py

@@ -15,7 +15,7 @@ def reload_translation_stats():
     STATS_FILE = settings.BASE_DIR.joinpath('InvenTree/locale_stats.json').absolute()
 
     try:
-        with open(STATS_FILE, 'r') as f:
+        with open(STATS_FILE, encoding='utf-8') as f:
             _translation_stats = json.load(f)
     except Exception:
         _translation_stats = None

src/backend/InvenTree/InvenTree/unit_test.py

@@ -246,8 +246,6 @@ class ExchangeRateMixin:
 class InvenTreeTestCase(ExchangeRateMixin, UserMixin, TestCase):
     """Testcase with user setup build in."""
 
-    pass
-
 
 class InvenTreeAPITestCase(ExchangeRateMixin, UserMixin, APITestCase):
     """Base class for running InvenTree API tests."""
@@ -283,9 +281,7 @@ class InvenTreeAPITestCase(ExchangeRateMixin, UserMixin, APITestCase):
             )  # pragma: no cover
 
         if verbose or n >= value:
-            msg = '\r\n%s' % json.dumps(
+            msg = f'\r\n{json.dumps(context.captured_queries, indent=4)}'  # pragma: no cover
-                context.captured_queries, indent=4
-            )  # pragma: no cover
         else:
             msg = None
 

src/backend/InvenTree/InvenTree/urls.py

@@ -456,7 +456,7 @@ urlpatterns = []
 if settings.INVENTREE_ADMIN_ENABLED:
     admin_url = settings.INVENTREE_ADMIN_URL
 
-    if settings.ADMIN_SHELL_ENABLE:  # noqa
+    if settings.ADMIN_SHELL_ENABLE:
         urlpatterns += [path(f'{admin_url}/shell/', include('django_admin_shell.urls'))]
 
     urlpatterns += [

src/backend/InvenTree/InvenTree/validators.py

@@ -96,7 +96,6 @@ def validate_sales_order_reference(value):
 
 def validate_tree_name(value):
     """Placeholder for legacy function used in migrations."""
-    ...
 
 
 def validate_overage(value):

src/backend/InvenTree/InvenTree/views.py

@@ -180,7 +180,7 @@ class InvenTreeRoleMixin(PermissionRequiredMixin):
             AjaxUpdateView: 'change',
         }
 
-        for view_class in permission_map.keys():
+        for view_class in permission_map:
             if issubclass(type(self), view_class):
                 return permission_map[view_class]
 
@@ -238,7 +238,6 @@ class AjaxMixin(InvenTreeRoleMixin):
         Ref: https://docs.djangoproject.com/en/dev/topics/forms/
         """
         # Do nothing by default
-        pass
 
     def renderJsonResponse(self, request, form=None, data=None, context=None):
         """Render a JSON response based on specific class context.
@@ -286,7 +285,7 @@ class AjaxMixin(InvenTreeRoleMixin):
         # Custom feedback`data
         fb = self.get_data()
 
-        for key in fb.keys():
+        for key in fb:
             data[key] = fb[key]
 
         return JsonResponse(data, safe=False)
@@ -329,11 +328,11 @@ class AjaxUpdateView(AjaxMixin, UpdateView):
             request, self.get_form(), context=self.get_context_data()
         )
 
-    def save(self, object, form, **kwargs):
+    def save(self, obj, form, **kwargs):
         """Method for updating the object in the database. Default implementation is very simple, but can be overridden if required.
 
         Args:
-            object: The current object, to be updated
+            obj: The current object, to be updated
             form: The validated form
 
         Returns:
@@ -578,14 +577,10 @@ class UserSessionOverride:
 class CustomSessionDeleteView(UserSessionOverride, SessionDeleteView):
     """Revert to settings after session delete."""
 
-    pass
-
 
 class CustomSessionDeleteOtherView(UserSessionOverride, SessionDeleteOtherView):
     """Revert to settings after session delete."""
 
-    pass
-
 
 class CustomLoginView(LoginView):
     """Custom login view that allows login with urlargs."""

src/backend/InvenTree/build/tasks.py

@@ -1,34 +1,31 @@
-"""Background task definitions for the BuildOrder app"""
+"""Background task definitions for the BuildOrder app."""
 
+import logging
 from datetime import timedelta
 from decimal import Decimal
-import logging
 
 from django.contrib.auth.models import User
-from django.utils.translation import gettext_lazy as _
 from django.template.loader import render_to_string
+from django.utils.translation import gettext_lazy as _
 
 from allauth.account.models import EmailAddress
 
-from plugin.events import trigger_event
-import common.notifications
 import build.models
-import InvenTree.email
+import common.notifications
 import InvenTree.helpers
+import InvenTree.helpers_email
 import InvenTree.helpers_model
 import InvenTree.tasks
-from InvenTree.ready import isImportingData
-from build.status_codes import BuildStatusGroups
-
 import part.models as part_models
-
+from build.status_codes import BuildStatusGroups
+from InvenTree.ready import isImportingData
+from plugin.events import trigger_event
 
 logger = logging.getLogger('inventree')
 
 
 def auto_allocate_build(build_id: int, **kwargs):
     """Run auto-allocation for a specified BuildOrder."""
-
     build_order = build.models.Build.objects.filter(pk=build_id).first()
 
     if not build_order:
@@ -40,7 +37,6 @@ def auto_allocate_build(build_id: int, **kwargs):
 
 def complete_build_allocations(build_id: int, user_id: int):
     """Complete build allocations for a specified BuildOrder."""
-
     build_order = build.models.Build.objects.filter(pk=build_id).first()
 
     if user_id:
@@ -185,7 +181,7 @@ def check_build_stock(build: build.models.Build):
 
         recipients = emails.values_list('email', flat=True)
 
-        InvenTree.email.send_email(subject, '', recipients, html_message=html_message)
+        InvenTree.helpers_email.send_email(subject, '', recipients, html_message=html_message)
 
 
 def create_child_builds(build_id: int) -> None:
@@ -225,7 +221,7 @@ def create_child_builds(build_id: int) -> None:
 
 
 def notify_overdue_build_order(bo: build.models.Build):
-    """Notify appropriate users that a Build has just become 'overdue'"""
+    """Notify appropriate users that a Build has just become 'overdue'."""
     targets = []
 
     if bo.issued_by:
@@ -265,7 +261,7 @@ def notify_overdue_build_order(bo: build.models.Build):
 
 @InvenTree.tasks.scheduled_task(InvenTree.tasks.ScheduledTask.DAILY)
 def check_overdue_build_orders():
-    """Check if any outstanding BuildOrders have just become overdue
+    """Check if any outstanding BuildOrders have just become overdue.
 
     - This check is performed daily
     - Look at the 'target_date' of any outstanding BuildOrder objects

src/backend/InvenTree/common/api.py

@@ -47,7 +47,7 @@ from plugin.models import NotificationUserSetting
 from plugin.serializers import NotificationUserSettingSerializer
 
 
-class CsrfExemptMixin(object):
+class CsrfExemptMixin:
     """Exempts the view from CSRF requirements."""
 
     @method_decorator(csrf_exempt)
@@ -136,7 +136,7 @@ class CurrencyExchangeView(APIView):
     serializer_class = None
 
     @extend_schema(responses={200: common.serializers.CurrencyExchangeSerializer})
-    def get(self, request, format=None):
+    def get(self, request, fmt=None):
         """Return information on available currency conversions."""
         # Extract a list of all available rates
         try:
@@ -244,10 +244,7 @@ class GlobalSettingsDetail(RetrieveUpdateAPI):
         """Attempt to find a global setting object with the provided key."""
         key = str(self.kwargs['key']).upper()
 
-        if (
+        if key.startswith('_') or key not in common.models.InvenTreeSetting.SETTINGS:
-            key.startswith('_')
-            or key not in common.models.InvenTreeSetting.SETTINGS.keys()
-        ):
             raise NotFound()
 
         return common.models.InvenTreeSetting.get_setting_object(
@@ -318,7 +315,7 @@ class UserSettingsDetail(RetrieveUpdateAPI):
 
         if (
             key.startswith('_')
-            or key not in common.models.InvenTreeUserSetting.SETTINGS.keys()
+            or key not in common.models.InvenTreeUserSetting.SETTINGS
         ):
             raise NotFound()
 
@@ -566,7 +563,7 @@ class BackgroundTaskOverview(APIView):
     permission_classes = [permissions.IsAuthenticated, IsAdminUser]
     serializer_class = None
 
-    def get(self, request, format=None):
+    def get(self, request, fmt=None):
         """Return information about the current status of the background task queue."""
         import django_q.models as q_models
 

src/backend/InvenTree/common/forms.py

@@ -65,7 +65,7 @@ class MatchFieldForm(forms.Form):
         for col in columns:
             field_name = col['name']
             self.fields[field_name] = forms.ChoiceField(
-                choices=[('', '-' * 10)] + headers_choices,
+                choices=[('', '-' * 10), *headers_choices],
                 required=False,
                 widget=forms.Select(attrs={'class': 'select fieldselect'}),
             )
@@ -83,10 +83,7 @@ class MatchItemForm(forms.Form):
         if 'file_manager' in kwargs:
             file_manager = kwargs.pop('file_manager')
 
-        if 'row_data' in kwargs:
+        row_data = kwargs.pop('row_data') if 'row_data' in kwargs else None
-            row_data = kwargs.pop('row_data')
-        else:
-            row_data = None
 
         super().__init__(*args, **kwargs)
 
@@ -134,7 +131,7 @@ class MatchItemForm(forms.Form):
                         item_match = row['match_' + col_guess]
                         # Set field select box
                         self.fields[field_name] = forms.ChoiceField(
-                            choices=[('', '-' * 10)] + item_options,
+                            choices=[('', '-' * 10), *item_options],
                             required=False,
                             widget=forms.Select(attrs={'class': 'select bomselect'}),
                         )
@@ -154,7 +151,7 @@ class MatchItemForm(forms.Form):
                         field_name = 'item_select-' + str(row['index'])
                         # Set field select box
                         self.fields[field_name] = forms.ChoiceField(
-                            choices=[('', '-' * 10)] + item_options,
+                            choices=[('', '-' * 10), *item_options],
                             required=False,
                             widget=forms.Select(attrs={'class': 'select bomselect'}),
                         )

src/backend/InvenTree/common/icons.py

@@ -55,7 +55,7 @@ def get_icon_packs():
         tabler_icons_path = Path(__file__).parent.parent.joinpath(
             'InvenTree/static/tabler-icons/icons.json'
         )
-        with open(tabler_icons_path, 'r') as tabler_icons_file:
+        with open(tabler_icons_path, encoding='utf-8') as tabler_icons_file:
             tabler_icons = json.load(tabler_icons_file)
 
         icon_packs = [

src/backend/InvenTree/common/models.py

@@ -248,7 +248,7 @@ class BaseInvenTreeSetting(models.Model):
 
         If a particular setting is not present, create it with the default value
         """
-        cache_key = f'BUILD_DEFAULT_VALUES:{str(cls.__name__)}'
+        cache_key = f'BUILD_DEFAULT_VALUES:{cls.__name__!s}'
 
         try:
             if InvenTree.helpers.str2bool(cache.get(cache_key, False)):
@@ -331,7 +331,7 @@ class BaseInvenTreeSetting(models.Model):
         - The unique KEY string
         - Any key:value kwargs associated with the particular setting type (e.g. user-id)
         """
-        key = f'{str(cls.__name__)}:{setting_key}'
+        key = f'{cls.__name__!s}:{setting_key}'
 
         for k, v in kwargs.items():
             key += f'_{k}:{v}'
@@ -2062,7 +2062,7 @@ class InvenTreeSetting(BaseInvenTreeSetting):
             'description': _(
                 'Check that all plugins are installed on startup - enable in container environments'
             ),
-            'default': str(os.getenv('INVENTREE_DOCKER', False)).lower()
+            'default': str(os.getenv('INVENTREE_DOCKER', 'False')).lower()
             in ['1', 'true'],
             'validator': bool,
             'requires_restart': True,
@@ -3092,11 +3092,8 @@ class CustomUnit(models.Model):
         """Ensure that the custom unit is unique."""
         super().validate_unique(exclude)
 
-        if self.symbol:
+        if self.symbol and (
-            if (
+            CustomUnit.objects.filter(symbol=self.symbol).exclude(pk=self.pk).exists()
-                CustomUnit.objects.filter(symbol=self.symbol)
-                .exclude(pk=self.pk)
-                .exists()
         ):
             raise ValidationError({'symbol': _('Unit symbol must be unique')})
 
@@ -3433,13 +3430,13 @@ class InvenTreeCustomUserStateModel(models.Model):
                 'reference_status': _('Reference status set not found')
             })
         ref_set = ref_set[0]
-        if self.key in ref_set.keys():
+        if self.key in ref_set.keys():  # noqa: SIM118
             raise ValidationError({
                 'key': _(
                     'Key must be different from the logical keys of the reference status'
                 )
             })
-        if self.logical_key not in ref_set.keys():
+        if self.logical_key not in ref_set.keys():  # noqa: SIM118
             raise ValidationError({
                 'logical_key': _(
                     'Logical key must be in the logical keys of the reference status'

src/backend/InvenTree/common/notifications.py

@@ -143,11 +143,7 @@ class NotificationMethod:
 
         # Check if method globally enabled
         plg_instance = registry.get_plugin(plg_cls.NAME.lower())
-        if plg_instance and not plg_instance.get_setting(self.GLOBAL_SETTING):
+        return plg_instance and not plg_instance.get_setting(self.GLOBAL_SETTING)
-            return True
-
-        # Lets go!
-        return False
 
     def usersetting(self, target):
         """Returns setting for this method for a given user."""
@@ -365,7 +361,7 @@ def trigger_notification(obj, category=None, obj_ref='pk', **kwargs):
         obj_ref_value = getattr(obj, 'id', None)
     if not obj_ref_value:
         raise KeyError(
-            f"Could not resolve an object reference for '{str(obj)}' with {obj_ref}, pk, id"
+            f"Could not resolve an object reference for '{obj!s}' with {obj_ref}, pk, id"
         )
 
     # Check if we have notified recently...
@@ -432,9 +428,9 @@ def trigger_notification(obj, category=None, obj_ref='pk', **kwargs):
                 deliver_notification(method, obj, category, target_users, context)
             except NotImplementedError as error:
                 # Allow any single notification method to fail, without failing the others
-                logger.error(error)  # noqa: LOG005
+                logger.error(error)
             except Exception as error:
-                logger.error(error)  # noqa: LOG005
+                logger.error(error)
 
         # Set delivery flag
         common.models.NotificationEntry.notify(category, obj_ref_value)

src/backend/InvenTree/common/serializers.py

@@ -574,8 +574,7 @@ class AttachmentSerializer(InvenTreeModelSerializer):
 
         model_type = self.validated_data.get('model_type', None)
 
-        if model_type is None:
+        if model_type is None and self.instance:
-            if self.instance:
             model_type = self.instance.model_type
 
         # Ensure that the user has permission to attach files to the specified model

src/backend/InvenTree/common/tests.py

@@ -393,7 +393,7 @@ class SettingsTest(InvenTreeTestCase):
             'before_save',
         ]
 
-        for k in setting.keys():
+        for k in setting:
             self.assertIn(k, allowed_keys)
 
         # Check default value for boolean settings
@@ -431,7 +431,7 @@ class SettingsTest(InvenTreeTestCase):
     @override_settings(SITE_URL=None, PLUGIN_TESTING=True, PLUGIN_TESTING_SETUP=True)
     def test_defaults(self):
         """Populate the settings with default values."""
-        for key in InvenTreeSetting.SETTINGS.keys():
+        for key in InvenTreeSetting.SETTINGS:
             value = InvenTreeSetting.get_setting_default(key)
 
             try:
@@ -520,7 +520,7 @@ class GlobalSettingsApiTest(InvenTreeAPITestCase):
         response = self.get(url, expected_code=200)
 
         n_public_settings = len([
-            k for k in InvenTreeSetting.SETTINGS.keys() if not k.startswith('_')
+            k for k in InvenTreeSetting.SETTINGS if not k.startswith('_')
         ])
 
         # Number of results should match the number of settings
@@ -832,11 +832,9 @@ class PluginSettingsApiTest(PluginMixin, InvenTreeAPITestCase):
 
     def test_invalid_setting_key(self):
         """Test that an invalid setting key returns a 404."""
-        ...
 
     def test_uninitialized_setting(self):
         """Test that requesting an uninitialized setting creates the setting."""
-        ...
 
 
 class ErrorReportTest(InvenTreeAPITestCase):
@@ -934,7 +932,7 @@ class WebhookMessageTests(TestCase):
     def test_bad_token(self):
         """Test that a wrong token is not working."""
         response = self.client.post(
-            self.url, content_type=CONTENT_TYPE_JSON, **{'HTTP_TOKEN': '1234567fghj'}
+            self.url, content_type=CONTENT_TYPE_JSON, HTTP_TOKEN='1234567fghj'
         )
 
         assert response.status_code == HTTPStatus.FORBIDDEN
@@ -957,7 +955,7 @@ class WebhookMessageTests(TestCase):
             self.url,
             data="{'this': 123}",
             content_type=CONTENT_TYPE_JSON,
-            **{'HTTP_TOKEN': str(self.endpoint_def.token)},
+            HTTP_TOKEN=str(self.endpoint_def.token),
         )
 
         assert response.status_code == HTTPStatus.NOT_ACCEPTABLE
@@ -1005,7 +1003,7 @@ class WebhookMessageTests(TestCase):
         response = self.client.post(
             self.url,
             content_type=CONTENT_TYPE_JSON,
-            **{'HTTP_TOKEN': str('68MXtc/OiXdA5e2Nq9hATEVrZFpLb3Zb0oau7n8s31I=')},
+            HTTP_TOKEN='68MXtc/OiXdA5e2Nq9hATEVrZFpLb3Zb0oau7n8s31I=',
         )
 
         assert response.status_code == HTTPStatus.OK
@@ -1020,7 +1018,7 @@ class WebhookMessageTests(TestCase):
             self.url,
             data={'this': 'is a message'},
             content_type=CONTENT_TYPE_JSON,
-            **{'HTTP_TOKEN': str(self.endpoint_def.token)},
+            HTTP_TOKEN=str(self.endpoint_def.token),
         )
 
         assert response.status_code == HTTPStatus.OK

src/backend/InvenTree/common/views.py

@@ -312,7 +312,6 @@ class FileManagementFormView(MultiStepFormView):
         This method is very specific to the type of data found in the file,
         therefore overwrite it in the subclass.
         """
-        pass
 
     def get_clean_items(self):
         """Returns dict with all cleaned values."""
@@ -363,10 +362,7 @@ class FileManagementFormView(MultiStepFormView):
         duplicates = []
 
         for col in self.column_names:
-            if col in self.column_selections:
+            guess = self.column_selections.get(col, None)
-                guess = self.column_selections[col]
-            else:
-                guess = None
 
             if guess:
                 n = list(self.column_selections.values()).count(

src/backend/InvenTree/company/apps.py

@@ -10,4 +10,3 @@ class CompanyConfig(AppConfig):
 
     def ready(self):
         """This function is called whenever the Company app is loaded."""
-        pass

src/backend/InvenTree/company/models.py

@@ -46,10 +46,7 @@ def rename_company_image(instance, filename):
     """
     base = 'company_images'
 
-    if filename.count('.') > 0:
+    ext = filename.split('.')[-1] if filename.count('.') > 0 else ''
-        ext = filename.split('.')[-1]
-    else:
-        ext = ''
 
     fn = f'company_{instance.pk}_img'
 

src/backend/InvenTree/generic/states/__init__.py

@@ -11,8 +11,8 @@ from .transition import StateTransitionMixin, TransitionMethod, storage
 
 __all__ = [
     'ColorEnum',
-    'StatusCode',
-    'storage',
-    'TransitionMethod',
     'StateTransitionMixin',
+    'StatusCode',
+    'TransitionMethod',
+    'storage',
 ]

src/backend/InvenTree/generic/states/states.py

@@ -5,7 +5,7 @@ import re
 from enum import Enum
 
 
-class BaseEnum(enum.IntEnum):
+class BaseEnum(enum.IntEnum):  # noqa: PLW1641
     """An `Enum` capabile of having its members have docstrings.
 
     Based on https://stackoverflow.com/questions/19330460/how-do-i-put-docstrings-on-enums
@@ -100,9 +100,7 @@ class StatusCode(BaseEnum):
             return False
         if callable(value):
             return False
-        if not isinstance(value.value, int):
+        return isinstance(value.value, int)
-            return False
-        return True
 
     @classmethod
     def values(cls, key=None):

src/backend/InvenTree/generic/states/tests.py

@@ -27,7 +27,6 @@ class GeneralStatus(StatusCode):
 
     def GHI(self):  # This should be ignored
         """A invalid function."""
-        ...
 
 
 class GeneralStateTest(InvenTreeTestCase):

src/backend/InvenTree/generic/templatetags/generic.py

@@ -3,6 +3,6 @@
 from django import template
 
 register = template.Library()
-from generic.states.tags import status_label  # noqa: E402
+from generic.states.tags import status_label
 
-__all__ = [status_label]
+__all__ = ['status_label']

src/backend/InvenTree/importer/mixins.py

@@ -213,8 +213,6 @@ class DataImportExportSerializerMixin(
 ):
     """Mixin class for adding data import/export functionality to a DRF serializer."""
 
-    pass
-
 
 class DataExportViewMixin:
     """Mixin class for exporting a dataset via the API.

src/backend/InvenTree/importer/models.py

@@ -2,6 +2,7 @@
 
 import json
 import logging
+from typing import Optional
 
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError as DjangoValidationError
@@ -117,8 +118,8 @@ class DataImportSession(models.Model):
         """
         mapping = {}
 
-        for map in self.column_mappings.all():
+        for i in self.column_mappings.all():
-            mapping[map.field] = map.column
+            mapping[i.field] = i.column
 
         return mapping
 
@@ -209,13 +210,13 @@ class DataImportSession(models.Model):
 
         missing_fields = []
 
-        for field in required_fields.keys():
+        for field in required_fields:
             # An override value exists
             if field in field_overrides:
                 continue
 
             # A default value exists
-            if field in field_defaults and field_defaults[field]:
+            if field_defaults.get(field):
                 continue
 
             # The field has been mapped to a data column
@@ -537,7 +538,10 @@ class DataImportRow(models.Model):
         return overrides
 
     def extract_data(
-        self, available_fields: dict = None, field_mapping: dict = None, commit=True
+        self,
+        available_fields: Optional[dict] = None,
+        field_mapping: Optional[dict] = None,
+        commit=True,
     ):
         """Extract row data from the provided data dictionary."""
         if not field_mapping:

src/backend/InvenTree/importer/operations.py

@@ -36,7 +36,7 @@ def load_data_file(data_file, file_format=None):
 
     try:
         data = file_object.read()
-    except (IOError, FileNotFoundError):
+    except (OSError, FileNotFoundError):
         raise ValidationError(_('Failed to open data file'))
 
     # Excel formats expect binary data
@@ -113,8 +113,7 @@ def get_field_label(field) -> str:
     Returns:
         str: Field label
     """
-    if field:
+    if field and (label := getattr(field, 'label', None)):
-        if label := getattr(field, 'label', None):
         return label
 
     # TODO: Check if the field is a model field

src/backend/InvenTree/importer/tests.py

@@ -19,7 +19,7 @@ class ImporterTest(InvenTreeTestCase):
 
         fn = os.path.join(os.path.dirname(__file__), 'test_data', 'companies.csv')
 
-        with open(fn, 'r') as input_file:
+        with open(fn, encoding='utf-8') as input_file:
             data = input_file.read()
 
         session = DataImportSession.objects.create(
@@ -61,4 +61,3 @@ class ImporterTest(InvenTreeTestCase):
 
     def test_field_defaults(self):
         """Test default field values."""
-        ...

src/backend/InvenTree/importer/validators.py

@@ -36,7 +36,7 @@ def validate_importer_model_type(value):
     """Validate that the given model type is supported for importing."""
     from importer.registry import supported_models
 
-    if value not in supported_models().keys():
+    if value not in supported_models():
         raise ValidationError(f"Unsupported model type '{value}'")
 
 

src/backend/InvenTree/machine/__init__.py

@@ -1,4 +1,4 @@
 from machine.machine_type import BaseDriver, BaseMachineType, MachineStatus
 from machine.registry import registry
 
-__all__ = ['registry', 'BaseMachineType', 'BaseDriver', 'MachineStatus']
+__all__ = ['BaseDriver', 'BaseMachineType', 'MachineStatus', 'registry']

src/backend/InvenTree/machine/machine_type.py

@@ -139,7 +139,7 @@ class BaseDriver(
         Arguments:
             error: Exception or string
         """
-        self.set_shared_state('errors', self.errors + [error])
+        self.set_shared_state('errors', [*self.errors, error])
 
     # --- state getters/setters
     @property
@@ -317,7 +317,7 @@ class BaseMachineType(
         Arguments:
             error: Exception or string
         """
-        self.set_shared_state('errors', self.errors + [error])
+        self.set_shared_state('errors', [*self.errors, error])
 
     def reset_errors(self):
         """Helper function for resetting the error list for a machine."""

src/backend/InvenTree/machine/machine_types/__init__.py

@@ -4,8 +4,8 @@ from machine.machine_types.label_printer import (
 )
 
 __all__ = [
-    # machine types
-    'LabelPrinterMachine',
     # base drivers
     'LabelPrinterBaseDriver',
+    # machine types
+    'LabelPrinterMachine',
 ]

src/backend/InvenTree/machine/registry.py

@@ -38,7 +38,7 @@ class MachineRegistry(
 
     def handle_error(self, error: Union[Exception, str]):
         """Helper function for capturing errors with the machine registry."""
-        self.set_shared_state('errors', self.errors + [error])
+        self.set_shared_state('errors', [*self.errors, error])
 
     def initialize(self, main: bool = False):
         """Initialize the machine registry."""

src/backend/InvenTree/machine/test_api.py

@@ -84,14 +84,12 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
             machine_type,
             {
                 **machine_type,
-                **{
                 'slug': 'label-printer',
                 'name': 'Label Printer',
                 'description': 'Directly print labels for various items.',
                 'provider_plugin': None,
                 'is_builtin': True,
             },
-            },
         )
         self.assertTrue(
             machine_type['provider_file'].endswith(
@@ -109,7 +107,6 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
             driver,
             {
                 **driver,
-                **{
                 'slug': 'test-label-printer-api',
                 'name': 'Test label printer',
                 'description': 'This is a test label printer driver for testing.',
@@ -118,7 +115,6 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
                 'machine_type': 'label-printer',
                 'driver_errors': [],
             },
-            },
         )
         self.assertEqual(driver['provider_file'], __file__)
 
@@ -173,7 +169,6 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
             response.data[0],
             {
                 **response.data[0],
-                **{
                 'name': 'Test Machine',
                 'machine_type': 'label-printer',
                 'driver': 'test-label-printer-api',
@@ -184,7 +179,6 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
                 'status_text': '',
                 'is_driver_available': True,
             },
-            },
         )
 
     def test_machine_detail(self):
@@ -216,9 +210,7 @@ class MachineAPITest(TestMachineRegistryMixin, InvenTreeAPITestCase):
             reverse('api-machine-detail', kwargs={'pk': pk}),
             {'name': 'Updated Machine'},
         )
-        self.assertEqual(
+        self.assertEqual(response.data, {**response.data, 'name': 'Updated Machine'})
-            response.data, {**response.data, **{'name': 'Updated Machine'}}
-        )
         self.assertEqual(MachineConfig.objects.get(pk=pk).name, 'Updated Machine')
 
         # Delete the machine

src/backend/InvenTree/order/api.py

@@ -337,8 +337,6 @@ class PurchaseOrderList(PurchaseOrderMixin, DataExportViewMixin, ListCreateAPI):
 class PurchaseOrderDetail(PurchaseOrderMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a PurchaseOrder object."""
 
-    pass
-
 
 class PurchaseOrderContextMixin:
     """Mixin to add purchase order object as serializer context variable."""
@@ -603,8 +601,6 @@ class PurchaseOrderLineItemList(
 class PurchaseOrderLineItemDetail(PurchaseOrderLineItemMixin, RetrieveUpdateDestroyAPI):
     """Detail API endpoint for PurchaseOrderLineItem object."""
 
-    pass
-
 
 class PurchaseOrderExtraLineList(GeneralExtraLineList, ListCreateAPI):
     """API endpoint for accessing a list of PurchaseOrderExtraLine objects."""
@@ -746,8 +742,6 @@ class SalesOrderList(SalesOrderMixin, DataExportViewMixin, ListCreateAPI):
 class SalesOrderDetail(SalesOrderMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a SalesOrder object."""
 
-    pass
-
 
 class SalesOrderLineItemFilter(LineItemFilter):
     """Custom filters for SalesOrderLineItemList endpoint."""
@@ -865,8 +859,6 @@ class SalesOrderLineItemList(
 class SalesOrderLineItemDetail(SalesOrderLineItemMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a SalesOrderLineItem object."""
 
-    pass
-
 
 class SalesOrderExtraLineList(GeneralExtraLineList, ListCreateAPI):
     """API endpoint for accessing a list of SalesOrderExtraLine objects."""
@@ -1181,8 +1173,6 @@ class ReturnOrderList(ReturnOrderMixin, DataExportViewMixin, ListCreateAPI):
 class ReturnOrderDetail(ReturnOrderMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a single ReturnOrder object."""
 
-    pass
-
 
 class ReturnOrderContextMixin:
     """Simple mixin class to add a ReturnOrder to the serializer context."""
@@ -1310,8 +1300,6 @@ class ReturnOrderLineItemList(
 class ReturnOrderLineItemDetail(ReturnOrderLineItemMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a ReturnOrderLineItem object."""
 
-    pass
-
 
 class ReturnOrderExtraLineList(GeneralExtraLineList, ListCreateAPI):
     """API endpoint for accessing a list of ReturnOrderExtraLine objects."""
@@ -1368,8 +1356,7 @@ class OrderCalendarExport(ICalFeed):
                 if auth[0].lower() == 'basic':
                     uname, passwd = base64.b64decode(auth[1]).decode('ascii').split(':')
                     user = authenticate(username=uname, password=passwd)
-                    if user is not None:
+                    if user is not None and user.is_active:
-                        if user.is_active:
                         login(request, user)
                         request.user = user
 

src/backend/InvenTree/order/models.py

@@ -1048,19 +1048,11 @@ class SalesOrder(TotalPriceMixin, Order):
 
     def is_fully_allocated(self):
         """Return True if all line items are fully allocated."""
-        for line in self.lines.all():
+        return all(line.is_fully_allocated() for line in self.lines.all())
-            if not line.is_fully_allocated():
-                return False
-
-        return True
 
     def is_overallocated(self):
         """Return true if any lines in the order are over-allocated."""
-        for line in self.lines.all():
+        return any(line.is_overallocated() for line in self.lines.all())
-            if line.is_overallocated():
-                return True
-
-        return False
 
     def is_completed(self):
         """Check if this order is "shipped" (all line items delivered)."""

src/backend/InvenTree/order/serializers.py

@@ -166,7 +166,8 @@ class AbstractOrderSerializer(DataImportExportSerializerMixin, serializers.Seria
             'notes',
             'barcode_hash',
             'overdue',
-        ] + extra_fields
+            *extra_fields,
+        ]
 
 
 class AbstractLineItemSerializer:
@@ -433,7 +434,7 @@ class PurchaseOrderLineItemSerializer(
 
     def skip_create_fields(self):
         """Return a list of fields to skip when creating a new object."""
-        return ['auto_pricing', 'merge_items'] + super().skip_create_fields()
+        return ['auto_pricing', 'merge_items', *super().skip_create_fields()]
 
     @staticmethod
     def annotate_queryset(queryset):
@@ -740,8 +741,7 @@ class PurchaseOrderLineItemReceiveSerializer(serializers.Serializer):
         base_quantity = line_item.part.base_quantity(quantity)
 
         # Does the quantity need to be "integer" (for trackable parts?)
-        if base_part.trackable:
+        if base_part.trackable and Decimal(base_quantity) != int(base_quantity):
-            if Decimal(base_quantity) != int(base_quantity):
             raise ValidationError({
                 'quantity': _(
                     'An integer quantity must be provided for trackable parts'

src/backend/InvenTree/order/test_api.py

@@ -1527,7 +1527,7 @@ class SalesOrderTest(OrderTest):
             self.download_file(
                 reverse('api-so-list'),
                 {'export': fmt},
-                decode=True if fmt == 'csv' else False,
+                decode=fmt == 'csv',
                 expected_code=200,
                 expected_fn=r'InvenTree_SalesOrder_.+',
             )

src/backend/InvenTree/order/views.py

@@ -294,7 +294,7 @@ class SalesOrderExport(AjaxView):
 
         export_format = request.GET.get('format', 'csv')
 
-        filename = f'{str(order)} - {order.customer.name}.{export_format}'
+        filename = f'{order!s} - {order.customer.name}.{export_format}'
 
         dataset = SalesOrderLineItemResource().export(queryset=order.lines.all())
 
@@ -321,7 +321,7 @@ class PurchaseOrderExport(AjaxView):
 
         export_format = request.GET.get('format', 'csv')
 
-        filename = f'{str(order)} - {order.supplier.name}.{export_format}'
+        filename = f'{order!s} - {order.supplier.name}.{export_format}'
 
         dataset = PurchaseOrderLineItemResource().export(queryset=order.lines.all())
 

src/backend/InvenTree/part/api.py

@@ -167,8 +167,7 @@ class CategoryFilter(rest_filters.FilterSet):
         top_level = str2bool(self.data.get('top_level', None))
 
         # If the parent is *not* provided, update the results based on the "cascade" value
-        if not parent or top_level:
+        if (not parent or top_level) and not value:
-            if not value:
             # If "cascade" is False, only return top-level categories
             queryset = queryset.filter(parent=None)
 
@@ -466,8 +465,6 @@ class PartTestTemplateMixin:
 class PartTestTemplateDetail(PartTestTemplateMixin, RetrieveUpdateDestroyAPI):
     """Detail endpoint for PartTestTemplate model."""
 
-    pass
-
 
 class PartTestTemplateList(PartTestTemplateMixin, DataExportViewMixin, ListCreateAPI):
     """API endpoint for listing (and creating) a PartTestTemplate."""
@@ -1570,8 +1567,6 @@ class PartParameterTemplateList(
 class PartParameterTemplateDetail(PartParameterTemplateMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for accessing the detail view for a PartParameterTemplate object."""
 
-    pass
-
 
 class PartParameterAPIMixin:
     """Mixin class for PartParameter API endpoints."""
@@ -1663,8 +1658,6 @@ class PartParameterList(PartParameterAPIMixin, DataExportViewMixin, ListCreateAP
 class PartParameterDetail(PartParameterAPIMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a single PartParameter object."""
 
-    pass
-
 
 class PartStocktakeFilter(rest_filters.FilterSet):
     """Custom filter for the PartStocktakeList endpoint."""
@@ -1922,8 +1915,6 @@ class BomList(BomMixin, DataExportViewMixin, ListCreateDestroyAPIView):
 class BomDetail(BomMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a single BomItem object."""
 
-    pass
-
 
 class BomImportUpload(CreateAPI):
     """API endpoint for uploading a complete Bill of Materials.

src/backend/InvenTree/part/bom.py

@@ -4,6 +4,7 @@ Primarily BOM upload tools.
 """
 
 from collections import OrderedDict
+from typing import Optional
 
 from django.utils.translation import gettext as _
 
@@ -40,7 +41,11 @@ def MakeBomTemplate(fmt):
 
 
 def ExportBom(
-    part: Part, fmt='csv', cascade: bool = False, max_levels: int = None, **kwargs
+    part: Part,
+    fmt='csv',
+    cascade: bool = False,
+    max_levels: Optional[int] = None,
+    **kwargs,
 ):
     """Export a BOM (Bill of Materials) for a given part.
 
@@ -244,10 +249,7 @@ def ExportBom(
                         manufacturer_name = ''
 
                     # Extract the "MPN" field from the Manufacturer Part
-                    if mp_part:
+                    manufacturer_mpn = mp_part.MPN if mp_part else ''
-                        manufacturer_mpn = mp_part.MPN
-                    else:
-                        manufacturer_mpn = ''
 
                     # Generate a column name for this manufacturer
                     k_man = f'{_("Manufacturer")}_{mp_idx}'
@@ -270,10 +272,7 @@ def ExportBom(
                             else:
                                 supplier_name = ''
 
-                            if sp_part:
+                            supplier_sku = sp_part.SKU if sp_part else ''
-                                supplier_sku = sp_part.SKU
-                            else:
-                                supplier_sku = ''
 
                             # Generate column names for this supplier
                             k_sup = (
@@ -307,10 +306,7 @@ def ExportBom(
 
                     supplier_parts_used.add(sp_part)
 
-                    if sp_part.supplier:
+                    supplier_name = sp_part.supplier.name if sp_part.supplier else ''
-                        supplier_name = sp_part.supplier.name
-                    else:
-                        supplier_name = ''
 
                     supplier_sku = sp_part.SKU
 

src/backend/InvenTree/part/models.py

@@ -231,10 +231,7 @@ class PartCategory(InvenTree.models.InvenTreeTree):
         """Get all unique parameter names for all parts from this category."""
         unique_parameters_names = []
 
-        if prefetch:
+        parts = prefetch or self.prefetch_parts_parameters(cascade=cascade)
-            parts = prefetch
-        else:
-            parts = self.prefetch_parts_parameters(cascade=cascade)
 
         for part in parts:
             for parameter in part.parameters.all():
@@ -248,10 +245,7 @@ class PartCategory(InvenTree.models.InvenTreeTree):
         """Get all parameter names and values for all parts from this category."""
         category_parameters = []
 
-        if prefetch:
+        parts = prefetch or self.prefetch_parts_parameters(cascade=cascade)
-            parts = prefetch
-        else:
-            parts = self.prefetch_parts_parameters(cascade=cascade)
 
         for part in parts:
             part_parameters = {
@@ -933,17 +927,19 @@ class Part(
                     'IPN': _('Duplicate IPN not allowed in part settings')
                 })
 
-        if self.revision_of and self.revision:
         if (
+            self.revision_of
+            and self.revision
+            and (
                 Part.objects.exclude(pk=self.pk)
                 .filter(revision_of=self.revision_of, revision=self.revision)
                 .exists()
+            )
         ):
             raise ValidationError(_('Duplicate part revision already exists.'))
 
         # Ensure unique across (Name, revision, IPN) (as specified)
-        if self.revision or self.IPN:
+        if (self.revision or self.IPN) and (
-            if (
             Part.objects.exclude(pk=self.pk)
             .filter(name=self.name, revision=self.revision, IPN=self.IPN)
             .exists()
@@ -3888,10 +3884,12 @@ class PartParameter(InvenTree.models.InvenTreeMetadataModel):
         super().clean()
 
         # Validate the parameter data against the template units
-        if get_global_setting(
+        if (
+            get_global_setting(
                 'PART_PARAMETER_ENFORCE_UNITS', True, cache=False, create=False
+            )
+            and self.template.units
         ):
-            if self.template.units:
             try:
                 InvenTree.conversion.convert_physical_value(
                     self.data, self.template.units
@@ -4205,8 +4203,7 @@ class BomItem(
         # Check if the part was changed
         deltas = self.get_field_deltas()
 
-        if 'part' in deltas:
+        if 'part' in deltas and (old_part := deltas['part'].get('old', None)):
-            if old_part := deltas['part'].get('old', None):
             self.check_part_lock(old_part)
 
         # Update the 'validated' field based on checksum calculation
@@ -4344,7 +4341,7 @@ class BomItem(
         - allow_variants
         """
         # Seed the hash with the ID of this BOM item
-        result_hash = hashlib.md5(''.encode())
+        result_hash = hashlib.md5(b'')
 
         # The following components are used to calculate the checksum
         components = [
@@ -4438,8 +4435,7 @@ class BomItem(
         try:
             ovg = float(overage)
 
-            if ovg < 0:
+            ovg = max(ovg, 0)
-                ovg = 0
 
             return ovg
         except ValueError:
@@ -4451,10 +4447,8 @@ class BomItem(
 
             try:
                 percent = float(overage) / 100.0
-                if percent > 1:
+                percent = min(percent, 1)
-                    percent = 1
+                percent = max(percent, 0)
-                if percent < 0:
-                    percent = 0
 
                 # Must be represented as a decimal
                 percent = Decimal(percent)

src/backend/InvenTree/part/serializers.py

@@ -2000,8 +2000,7 @@ class BomImportExtractSerializer(InvenTree.serializers.DataFileExtractSerializer
 
         if part is None:
             row['errors']['part'] = _('No matching part found')
-        else:
+        elif not part.component:
-            if not part.component:
             row['errors']['part'] = _('Part is not designated as a component')
 
         # Update the 'part' value in the row

src/backend/InvenTree/part/test_api.py

@@ -1618,7 +1618,7 @@ class PartDetailTests(PartAPITestBase):
 
         # Try to upload a non-image file
         test_path = BASE_DIR / '_testfolder' / 'dummy_image'
-        with open(f'{test_path}.txt', 'w') as dummy_image:
+        with open(f'{test_path}.txt', 'w', encoding='utf-8') as dummy_image:
             dummy_image.write('hello world')
 
         with open(f'{test_path}.txt', 'rb') as dummy_image:

src/backend/InvenTree/part/test_bom_export.py

@@ -49,7 +49,7 @@ class BomExportTest(InvenTreeTestCase):
         with open(filename, 'wb') as f:
             f.write(response.getvalue())
 
-        with open(filename, 'r') as f:
+        with open(filename, encoding='utf-8') as f:
             reader = csv.reader(f, delimiter=',')
 
             for line in reader:
@@ -96,7 +96,7 @@ class BomExportTest(InvenTreeTestCase):
             f.write(response.getvalue())
 
         # Read the file
-        with open(filename, 'r') as f:
+        with open(filename, encoding='utf-8') as f:
             reader = csv.reader(f, delimiter=',')
 
             for line in reader:

src/backend/InvenTree/part/test_param.py

@@ -419,7 +419,7 @@ class PartParameterTest(InvenTreeAPITestCase):
 
         response = self.get(
             url,
-            {'ordering': 'parameter_{pk}'.format(pk=template.pk), 'parameters': 'true'},
+            {'ordering': f'parameter_{template.pk}', 'parameters': 'true'},
             expected_code=200,
         )
 
@@ -436,10 +436,7 @@ class PartParameterTest(InvenTreeAPITestCase):
         # Next, check reverse ordering
         response = self.get(
             url,
-            {
+            {'ordering': f'-parameter_{template.pk}', 'parameters': 'true'},
-                'ordering': '-parameter_{pk}'.format(pk=template.pk),
-                'parameters': 'true',
-            },
             expected_code=200,
         )
 

src/backend/InvenTree/part/test_pricing.py

@@ -111,7 +111,6 @@ class PartPricingTests(InvenTreeTestCase):
 
     def test_invalid_rate(self):
         """Ensure that conversion behaves properly with missing rates."""
-        ...
 
     def test_simple(self):
         """Tests for hard-coded values."""

src/backend/InvenTree/part/views.py

@@ -180,9 +180,9 @@ class PartImport(FileManagementFormView):
 
                 if idx in self.file_manager.OPTIONAL_MATCH_HEADERS:
                     try:
-                        exact_match = self.allowed_items[idx].get(**{
+                        exact_match = self.allowed_items[idx].get(
-                            a: data for a in self.matches[idx]
+                            **dict.fromkeys(self.matches[idx], data)
-                        })
+                        )
                     except (
                         ValueError,
                         self.allowed_items[idx].model.DoesNotExist,
@@ -414,7 +414,7 @@ class PartDetailFromIPN(PartDetail):
         if not self.object:
             return HttpResponseRedirect(reverse('part-index'))
 
-        return super(PartDetailFromIPN, self).get(request, *args, **kwargs)
+        return super().get(request, *args, **kwargs)
 
 
 class PartImageSelect(AjaxUpdateView):

src/backend/InvenTree/plugin/__init__.py

@@ -5,8 +5,8 @@ from .plugin import InvenTreePlugin
 from .registry import registry
 
 __all__ = [
-    'registry',
     'InvenTreePlugin',
-    'MixinNotImplementedError',
     'MixinImplementationError',
+    'MixinNotImplementedError',
+    'registry',
 ]

src/backend/InvenTree/plugin/api.py

@@ -63,7 +63,7 @@ class PluginFilter(rest_filters.FilterSet):
             match = True
 
             for mixin in mixins:
-                if mixin not in result.mixins().keys():
+                if mixin not in result.mixins():
                     match = False
                     break
 

src/backend/InvenTree/plugin/base/barcodes/api.py

@@ -335,8 +335,7 @@ class BarcodePOAllocate(BarcodeView):
         if not part and not supplier_part and not manufacturer_part:
             raise ValidationError({'error': _('No matching part data found')})
 
-        if part:
+        if part and (part_id := part.get('pk', None)):
-            if part_id := part.get('pk', None):
             supplier_parts = supplier_parts.filter(part__pk=part_id)
 
         if supplier_part:
@@ -594,7 +593,7 @@ class BarcodeSOAllocate(BarcodeView):
                 raise ValidationError(response)
 
         # If we have sufficient information, we can allocate the stock item
-        if all((x is not None for x in [line_item, sales_order, shipment, quantity])):
+        if all(x is not None for x in [line_item, sales_order, shipment, quantity]):
             order.models.SalesOrderAllocation.objects.create(
                 line=line_item, shipment=shipment, item=stock_item, quantity=quantity
             )

src/backend/InvenTree/plugin/base/barcodes/mixins.py

@@ -384,7 +384,9 @@ class SupplierBarcodeMixin(BarcodeMixin):
             return orders_intersection if orders_intersection else orders_union
 
     @staticmethod
-    def get_supplier_parts(sku: str = None, supplier: Company = None, mpn: str = None):
+    def get_supplier_parts(
+        sku: str | None = None, supplier: Company = None, mpn: str | None = None
+    ):
         """Get a supplier part from SKU or by supplier and MPN."""
         if not (sku or supplier or mpn):
             return SupplierPart.objects.none()
@@ -420,10 +422,10 @@ class SupplierBarcodeMixin(BarcodeMixin):
     def receive_purchase_order_item(
         supplier_part: SupplierPart,
         user: User,
-        quantity: Decimal | str = None,
+        quantity: Decimal | str | None = None,
         purchase_order: PurchaseOrder = None,
         location: StockLocation = None,
-        barcode: str = None,
+        barcode: str | None = None,
     ) -> dict:
         """Try to receive a purchase order item.
 
@@ -471,9 +473,9 @@ class SupplierBarcodeMixin(BarcodeMixin):
             # 2. check if it's defined on the part
             # 3. check if there's 1 or 0 stock locations defined in InvenTree
             #    -> assume all stock is going into that location (or no location)
-            if location := line_item.destination:
+            if (location := line_item.destination) or (
-                pass
+                location := supplier_part.part.get_default_location()
-            elif location := supplier_part.part.get_default_location():
+            ):
                 pass
             elif StockLocation.objects.count() <= 1:
                 if not (location := StockLocation.objects.first()):

src/backend/InvenTree/plugin/base/barcodes/serializers.py

@@ -41,7 +41,7 @@ class BarcodeGenerateSerializer(serializers.Serializer):
             plugin.base.barcodes.helper.get_supported_barcode_models_map()
         )
 
-        if model not in supported_models.keys():
+        if model not in supported_models:
             raise ValidationError(_('Model is not supported'))
 
         return model

src/backend/InvenTree/plugin/base/event/events.py

@@ -147,10 +147,7 @@ def allow_table_event(table_name):
         'part_partstocktakereport',
     ]
 
-    if table_name in ignore_tables:
+    return not table_name in ignore_tables
-        return False
-
-    return True
 
 
 @receiver(post_save)

src/backend/InvenTree/plugin/base/integration/APICallMixin.py

@@ -3,6 +3,7 @@
 import json as json_pkg
 import logging
 from collections.abc import Iterable
+from typing import Optional
 
 import requests
 
@@ -117,10 +118,10 @@ class APICallMixin:
         self,
         endpoint: str,
         method: str = 'GET',
-        url_args: dict = None,
+        url_args: Optional[dict] = None,
         data=None,
         json=None,
-        headers: dict = None,
+        headers: Optional[dict] = None,
         simple_response: bool = True,
         endpoint_is_url: bool = False,
     ):

src/backend/InvenTree/plugin/base/integration/ReportMixin.py

@@ -33,7 +33,6 @@ class ReportMixin:
             request: The request object which initiated the report generation
             context: The context dictionary to add to
         """
-        pass
 
     def add_label_context(self, label_instance, model_instance, request, context):
         """Add extra context to the provided label instance.
@@ -46,7 +45,6 @@ class ReportMixin:
             request: The request object which initiated the label generation
             context: The context dictionary to add to
         """
-        pass
 
     def report_callback(self, template, instance, report, request):
         """Callback function called after a report is generated.
@@ -59,4 +57,3 @@ class ReportMixin:
 
         The default implementation does nothing.
         """
-        pass

src/backend/InvenTree/plugin/base/integration/ScheduleMixin.py

@@ -148,7 +148,7 @@ class ScheduleMixin:
     def get_task_names(self):
         """All defined task names."""
         # Returns a list of all task names associated with this plugin instance
-        return [self.get_task_name(key) for key in self.scheduled_tasks.keys()]
+        return [self.get_task_name(key) for key in self.scheduled_tasks]
 
     def register_tasks(self):
         """Register the tasks with the database."""
@@ -200,7 +200,7 @@ class ScheduleMixin:
         try:
             from django_q.models import Schedule
 
-            for key, _ in self.scheduled_tasks.items():
+            for key in self.scheduled_tasks:
                 task_name = self.get_task_name(key)
 
                 try:

src/backend/InvenTree/plugin/base/integration/SettingsMixin.py

@@ -15,8 +15,6 @@ else:
     class SettingsKeyType:
         """Dummy class, so that python throws no error."""
 
-        pass
-
 
 class SettingsMixin:
     """Mixin that enables global settings for the plugin."""

src/backend/InvenTree/plugin/base/integration/ValidationMixin.py

@@ -1,5 +1,7 @@
 """Validation mixin class definition."""
 
+from typing import Optional
+
 from django.core.exceptions import ValidationError
 from django.db.models import Model
 
@@ -67,7 +69,9 @@ class ValidationMixin:
         """
         return None
 
-    def validate_model_instance(self, instance: Model, deltas: dict = None) -> None:
+    def validate_model_instance(
+        self, instance: Model, deltas: Optional[dict] = None
+    ) -> None:
         """Run custom validation on a database model instance.
 
         This method is called when a model instance is being validated.
@@ -218,4 +222,3 @@ class ValidationMixin:
         Raises:
             ValidationError: If the proposed parameter value is objectionable
         """
-        pass