Django——启动项目时报错mysqlclient

报错内容如下：

Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\threading.py", line 954, in _bootstrap_inner
    self.run()
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\threading.py", line 892, in run
    self._target(*self._args, **self._kwargs)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\commands\runserver.py", line 110, in inner_run
    autoreload.raise_last_exception()
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
    raise _exception[1]
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\__init__.py", line 375, in execute
    autoreload.check_errors(django.setup)()
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\apps\registry.py", line 114, in populate
    app_config.import_models()
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\apps\config.py", line 301, in import_models
    self.models_module = import_module(models_module_name)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\auth\models.py", line 3, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\auth\base_user.py", line 48, in <module>
    class AbstractBaseUser(models.Model):
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py", line 122, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py", line 326, in add_to_class
    value.contribute_to_class(cls, name)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\options.py", line 207, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\connection.py", line 15, in __getattr__
    return getattr(self._connections[self._alias], item)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\connection.py", line 62, in __getitem__
    conn = self.create_connection(alias)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\utils.py", line 204, in create_connection
    backend = load_backend(db['ENGINE'])
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "D:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 36, in <module>
    raise ImproperlyConfigured('mysqlclient 1.4.0 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.4.0 or newer is required; you have 0.9.1.

　　

解决方式：  pymysql.version_info = (1, 4, 13, "final", 0)