Django的部分bug

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\core\management\__init__.py", line 377, in execute
    django.setup()
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\apps\registry.py", line 95, in populate
    "duplicates: %s" % app_config.label)
django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: MyApp

在setting文件里面重复添加了app的那么，因为在项目创建的时候就默认添加了名字，没必要再添加了

出现这个bug

File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\models\base.py", line 325, in add_to_class
    value.contribute_to_class(cls, name)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\models\options.py", line 208, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\utils.py", line 207, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "F:\PythonWorkPlace\HelloDjango\venv\lib\site-packages\django\db\backends\mysql\base.py", line 37, in <module>
    raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.

运行：

python manage.py makemigrations

python manage.py migrate

 

成功！！！！！！！！！