Reformat django settings export

core/util/django_settings_export.py

@@ -7,13 +7,10 @@ https://github.com/jakubroztocil/django-settings-export
 from django.conf import settings as django_settings
 from django.core.exceptions import ImproperlyConfigured
 
-
-__version__ = '1.2.1'
+__version__ = "1.2.1"
 
 
-VARIABLE_NAME = getattr(django_settings,
-                        'SETTINGS_EXPORT_VARIABLE_NAME',
-                        'settings')
+VARIABLE_NAME = getattr(django_settings, "SETTINGS_EXPORT_VARIABLE_NAME", "settings")
 
 
 class SettingsExportError(ImproperlyConfigured):
@@ -35,16 +32,13 @@ def settings_export(request):
     set, the context variable will be `settings`.
 
     """
-    variable_name = getattr(django_settings,
-                            'SETTINGS_EXPORT_VARIABLE_NAME',
-                            'settings')
-    return {
-        variable_name: _get_exported_settings()
-    }
+    variable_name = getattr(
+        django_settings, "SETTINGS_EXPORT_VARIABLE_NAME", "settings"
+    )
+    return {variable_name: _get_exported_settings()}
 
 
 class ExportedSettings(dict):
-
     def __getitem__(self, item):
         """Fail loudly if accessing a setting that is not exported."""
         try:
@@ -55,24 +49,21 @@ class ExportedSettings(dict):
                 # can access the existing attribute (e.g. `items()`).
                 raise
             raise UnexportedSettingError(
-                'The `{key}` setting key is not accessible'
+                "The `{key}` setting key is not accessible"
                 ' from templates: add "{key}" to'
-                ' `settings.SETTINGS_EXPORT` to change that.'
-                .format(key=item)
+                " `settings.SETTINGS_EXPORT` to change that.".format(key=item)
             )
 
 
 def _get_exported_settings():
     exported_settings = ExportedSettings()
-    for key in getattr(django_settings, 'SETTINGS_EXPORT', []):
+    for key in getattr(django_settings, "SETTINGS_EXPORT", []):
         try:
             value = getattr(django_settings, key)
         except AttributeError:
             raise UndefinedSettingError(
                 '"settings.%s" is included in settings.SETTINGS_EXPORT '
-                'but it does not exist. '
-                % key
+                "but it does not exist. " % key
             )
         exported_settings[key] = value
     return exported_settings
-