错误信息如下：

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 "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 345, in execute
    settings.INSTALLED_APPS
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 83, in __getattr__
    self._setup(name)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 70, in _setup
    self._wrapped = Settings(settings_module)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 177, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/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 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/vito/Desktop/django_demo/student_management/student_management/settings.py", line 57, in <module>
    'DIRS': [BASE_DIR+'templates',],
TypeError: unsupported operand type(s) for +: 'PosixPath' and 'str'

解决方法：将settings中的'DIRS': [BASE_DIR+'templates',],改为：

'DIRS': [BASE_DIR,'templates',],

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针对Django错误unsupported operand type(s) for +: ‘PosixPath‘ and ‘str‘的解决办法_python