Traceback (most recent call last):
  File "D:/Py/work/Synchro34/test.py", line 195, in <module>
    test_sqlachemy1_1_5()
  File "D:/Py/work/Synchro34/test.py", line 190, in test_sqlachemy1_1_5
    mysql_engine = sqlalchemy.create_engine('mysql://user:xxx@host')  # connect to server
  File "D:\Py\Python34\lib\site-packages\sqlalchemy\engine\__init__.py", line 387, in create_engine
    return strategy.create(*args, **kwargs)
  File "D:\Py\Python34\lib\site-packages\sqlalchemy\engine\strategies.py", line 80, in create
    dbapi = dialect_cls.dbapi(**dbapi_args)
  File "D:\Py\Python34\lib\site-packages\sqlalchemy\dialects\mysql\mysqldb.py", line 110, in dbapi
    return __import__('MySQLdb')
ImportError: No module named 'MySQLdb'

engine = ("mysql://{user}:{password}@{db_host}/{db_name}?charset=utf8mb4")