error：django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required； you have

在更新模型关系映射执行命令：python manage.py makemigrations命令时出现如下错误：

(django_01) D:\pycharmProject\study\django\django_01>python manage.py makemigrations
Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\core\management\__init__.py", line 377, in execute
    django.setup()
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\apps\registry.py", line 114, in populate
    app_config.import_models()
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\apps\config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "D:\workSpace_env\envs\django_01\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\contrib\auth\models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\contrib\auth\base_user.py", line 47, in <module>
    class AbstractBaseUser(models.Model):
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\db\models\base.py", line 121, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\db\models\base.py", line 325, in add_to_class
    value.contribute_to_class(cls, name)
  File "D:\workSpace_env\envs\django_01\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 "D:\workSpace_env\envs\django_01\lib\site-packages\django\db\__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\db\utils.py", line 207, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "D:\workSpace_env\envs\django_01\lib\site-packages\django\db\utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "D:\workSpace_env\envs\django_01\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "D:\workSpace_env\envs\django_01\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 1.3.12.

解决办法：
在django模块的源文件中找到D:\workSpace_env\envs\django_01\Lib\site-packages\django\db\backends\mysql\base.py文件，并注释掉line36-37,去除这个判断。

#if version < (1, 3, 13):
#    raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)