突然出现 Django ModuleNotFoundError

Question

突然之间，我的 django 项目不再工作了。不仅是我的实际分支，甚至是大师。这发生在晚上回到我的项目之后。我遇到的错误是当我运行任何命令时都会收到此消息：

ModuleNotFoundError: No module named 'pur_beurre.pur_beurre'

（注意：pur_beurre 是我的项目名称）

当我运行 python manage.py 时，我有所有可能的命令的列表以及这条红色的新消息：

Note that only Django core commands are listed as settings are not properly configured (error: No module named 'pur_beurre.pur_beurre').

我尝试将 pur_beurre 和 pur_beurre.pur_beurre 放入我已安装的应用程序 settings.py 中，但它不起作用。

PS C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\pur_beurre> python .\manage.py runserver
Traceback (most recent call last):
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\base.py", line 373, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\commands\runserver.py", line 66, in execute
    super().execute(*args, **options)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\base.py", line 417, in execute
    output = self.handle(*args, **options)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\commands\runserver.py", line 73, in handle
    if not settings.DEBUG and not settings.ALLOWED_HOSTS:
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 84, in __getattr__
    self._setup(name)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 71, in _setup
    self._wrapped = Settings(settings_module)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 179, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "C:\Users\tdechanet.TWM\AppData\Local\Programs\Python\Python38-32\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'pur_beurre.pur_beurre'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File ".\manage.py", line 22, in <module>
    main()
  File ".\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\__init__.py", line 425, in execute_from_command_line
    utility.execute()
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\__init__.py", line 419, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\core\management\base.py", line 386, in run_from_argv
    connections.close_all()
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\db\utils.py", line 208, in close_all
    for alias in self:
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\utils\connection.py", line 73, in __iter__
    return iter(self.settings)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\utils\connection.py", line 45, in settings
    self._settings = self.configure_settings(self._settings)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\db\utils.py", line 144, in configure_settings
    databases = super().configure_settings(databases)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\utils\connection.py", line 50, in configure_settings
    settings = getattr(django_settings, self.settings_name)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 84, in __getattr__
    self._setup(name)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 71, in _setup
    self._wrapped = Settings(settings_module)
  File "C:\Users\tdechanet.TWM\Documents\OpenClassrooms\p8\code\.venv\lib\site-packages\django\conf\__init__.py", line 179, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "C:\Users\tdechanet.TWM\AppData\Local\Programs\Python\Python38-32\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'pur_beurre.pur_beurre'

这是我安装的应用程序：

INSTALLED_APPS = [
    'main_site.apps.MainSiteConfig',
    'user_management.apps.UserManagementConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

Answer 1

manage.py 的第一行是

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'pur_beurre.settings')

仅当 DJANGO_SETTINGS_MODULE 未在系统级别定义时，才将设置的标准路径设置为默认值。

您的错误消息看起来像您在 Windows 上定义了一个环境变量 DJANGO_SETTINGS_MODULE="pur_beurre.pur_beurre"

只是检查在manage.py开头添加这一行：

print(os.environ['DJANGO_SETTINGS_MODULE'])

然后检查变量的windows设置，更正或删除，以防万一重新启动。