Python 正在运行这个django项目，但它在manage.py中显示了这个错误

这是在运行django项目的可搜索下拉列表时显示的错误。我完全按照youtube视频中提到的那样做了，但这些都是它显示给我的错误

File "manage.py", line 23, in <module>
    main()
  File "manage.py", line 19, in main
    execute_from_command_line(sys.argv)
  File "C:\ProgramData\Anaconda3\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\ProgramData\Anaconda3\lib\site-packages\django\core\management\__init__.py", line 345, in execute
    settings.INSTALLED_APPS
  File "C:\ProgramData\Anaconda3\lib\site-packages\django\conf\__init__.py", line 83, in __getattr__
    self._setup(name)
  File "C:\ProgramData\Anaconda3\lib\site-packages\django\conf\__init__.py", line 70, in _setup
    self._wrapped = Settings(settings_module)
  File "C:\ProgramData\Anaconda3\lib\site-packages\django\conf\__init__.py", line 177, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "C:\ProgramData\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\mahima\Downloads\dropdown\ddl\ddl\settings.py", line 58, in <module>
    'DIRS': [os.path.join(BASE_DIR,'templates')],
NameError: name 'os' is not defined

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尝试在文件C:\Users\mahima\Downloads\dropdown\ddl\ddl\settings.py的顶部添加

import os

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您似乎错过了模块的导入

设置中有错误。py未管理，pyyes，谢谢。我这样做了，但现在它向我显示了这个>``django.db.utils.OperationalError:（1045，“用户'mahima'的访问被拒绝@'localhost'（使用密码：YES）”）```

import os