解决django.core.exceptions.ImproperlyConfigured：Error loading MySQLdb module: No module named 'MySQLdb

Traceback (most recent call last):
  File "manage.py", line 22, in 
    execute_from_command_line(sys.argv)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\core\management\__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\core\management\__init__.py", line 341, in execute
    django.setup()
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\apps\registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\apps\config.py", line 199, in import_models
    self.models_module = import_module(models_module_name)
  File "E:\Djangoproject\blog_project_venv\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 994, in _gcd_import
  File "", line 971, in _find_and_load
  File "", line 955, in _find_and_load_unlocked
  File "", line 665, in _load_unlocked
  File "", line 678, in exec_module
  File "", line 219, in _call_with_frames_removed
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\contrib\auth\models.py", line 4, in 
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\contrib\auth\base_user.py", line 52, in 
    class AbstractBaseUser(models.Model):
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\models\base.py", line 119, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\models\base.py", line 316, in add_to_class
    value.contribute_to_class(cls, name)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\models\options.py", line 214, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\__init__.py", line 36, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\utils.py", line 211, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\utils.py", line 115, in load_backend
    return import_module('%s.base' % backend_name)
  File "E:\Djangoproject\blog_project_venv\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "E:\Djangoproject\blog_project_venv\lib\site-packages\django\db\backends\mysql\base.py", line 28, in 
    raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named 'MySQLdb'

或者在创建app的时候报如下提示：

ImproperlyConfigured: Error loading MySQLdb module: No module named 'MySQLdb'.
Did you install mysqlclient or MySQL-python?

解决方法：
在_init_.py文件中添加以下代码

import pymysql
pymysql.install_as_MySQLdb()