win7下python2.7 ImportError: No module named 'MySQLdb'错误解决方法

环境描述：

在github上面 下载了一个flask项目之后

 python manage.py db upgradeTraceback (most recent call last):  File "manage.py", line 17, in <module>    manager.run()  File "C:\Python27\lib\site-packages\flask_script\__init__.py", line 412, in run    result = self.handle(sys.argv[0], sys.argv[1:])  File "C:\Python27\lib\site-packages\flask_script\__init__.py", line 383, in handle    res = handle(*args, **config)  File "C:\Python27\lib\site-packages\flask_script\commands.py", line 216, in __call__    return self.run(*args, **kwargs)  File "C:\Python27\lib\site-packages\flask_migrate\__init__.py", line 235, in upgrade    command.upgrade(config, revision, sql=sql, tag=tag)  File "C:\Python27\lib\site-packages\alembic\command.py", line 174, in upgrade    script.run_env()  File "C:\Python27\lib\site-packages\alembic\script\base.py", line 397, in run_env    util.load_python_file(self.dir, 'env.py')  File "C:\Python27\lib\site-packages\alembic\util\pyfiles.py", line 93, in load_python_file    module = load_module_py(module_id, path)  File "C:\Python27\lib\site-packages\alembic\util\compat.py", line 79, in load_module_py    mod = imp.load_source(module_id, path, fp)  File "migrations\env.py", line 87, in <module>    run_migrations_online()  File "migrations\env.py", line 70, in run_migrations_online    poolclass=pool.NullPool)  File "C:\Python27\lib\site-packages\sqlalchemy\engine\__init__.py", line 427, in engine_from_config    return create_engine(url, **options)  File "C:\Python27\lib\site-packages\sqlalchemy\engine\__init__.py", line 386, in create_engine    return strategy.create(*args, **kwargs)  File "C:\Python27\lib\site-packages\sqlalchemy\engine\strategies.py", line 75, in create    dbapi = dialect_cls.dbapi(**dbapi_args)  File "C:\Python27\lib\site-packages\sqlalchemy\dialects\mysql\mysqldb.py", line 92, in dbapi    return __import__('MySQLdb')ImportError: No module named MySQLdb

python manage.py db upgrade 执行报错

在网上搜索了解决方案如下：

1. 安装PyMySQL

$ pip install PyMySQLCollecting PyMySQL  Downloading PyMySQL-0.7.11-py2.py3-none-any.whl (78kB)Installing collected packages: PyMySQLSuccessfully installed PyMySQL-0.7.11

2 .列表内容

. 在项目的init.py中添加

import pymysqlpymysql.install_as_MySQLdb()

3.成功执行python manage.py db upgrade

$ python manage.py db upgradeINFO  [alembic.runtime.migration] Context impl MySQLImpl.INFO  [alembic.runtime.migration] Will assume non-transactional DDL.INFO  [alembic.runtime.migration] Running upgrade  -> 83fd966f85c2, empty messageINFO  [alembic.runtime.migration] Running upgrade 83fd966f85c2 -> fb71a8f269d8, empty messageINFO  [alembic.runtime.migration] Running upgrade fb71a8f269d8 -> 59e062953154, empty messageINFO  [alembic.runtime.migration] Running upgrade 59e062953154 -> 39c00b1bb40c, empty messageINFO  [alembic.runtime.migration] Running upgrade 39c00b1bb40c -> 2b5859bebcf1, empty messageINFO  [alembic.runtime.migration] Running upgrade 2b5859bebcf1 -> 8e75c327e44f, empty messageINFO  [alembic.runtime.migration] Running upgrade 8e75c327e44f -> c02c89e63a71, empty messageINFO  [alembic.runtime.migration] Running upgrade c02c89e63a71 -> 62582649ce6e, empty messageINFO  [alembic.runtime.migration] Running upgrade 62582649ce6e -> 2a798695be49, empty messageINFO  [alembic.runtime.migration] Running upgrade 2a798695be49 -> 3420f22521af, empty messageINFO  [alembic.runtime.migration] Running upgrade 3420f22521af -> dfad1f2acb22, empty message