用flask搭建视频网站运行models.py出现错误sqlalchemy.exc.NoSuchModuleError: Can't load plugin:

[qq_36234109]

错误报告
(venv) E:\movie_project>python.exe E:\movie_project\app\models.py
Traceback (most recent call last):
File "E:\movie_project\app\models.py", line 159, in <module>
db.create_all()
File "E:\movie_project\venv\lib\site-packages\flask_sqlalchemy\__init__.py", line 963, in create_all
self._execute_for_all_tables(app, bind, 'create_all')
File "E:\movie_project\venv\lib\site-packages\flask_sqlalchemy\__init__.py", line 955, in _execute_for_all_tables
op(bind=self.get_engine(app, bind), **extra)
File "E:\movie_project\venv\lib\site-packages\flask_sqlalchemy\__init__.py", line 896, in get_engine
return connector.get_engine()
File "E:\movie_project\venv\lib\site-packages\flask_sqlalchemy\__init__.py", line 559, in get_engine
self._engine = rv = sqlalchemy.create_engine(info, **options)
File "E:\movie_project\venv\lib\site-packages\sqlalchemy\engine\__init__.py", line 424, in create_engine
return strategy.create(*args, **kwargs)
File "E:\movie_project\venv\lib\site-packages\sqlalchemy\engine\strategies.py", line 57, in create
entrypoint = u._get_entrypoint()
File "E:\movie_project\venv\lib\site-packages\sqlalchemy\engine\url.py", line 156, in _get_entrypoint
cls = registry.load(name)
File "E:\movie_project\venv\lib\site-packages\sqlalchemy\util\langhelpers.py", line 221, in load
(self.group, name))
sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:mysql.pymsql

[oyljerry]

你使用的方法不对。不存在