Python中sqlalchemy库如何使用？

$ pip install sqlalchemy

>>> import sqlalchemy

>>> sqlalchemy.__version__

>>> '1.0.12'

# 建立连接

from sqlalchemy import create_engine

engine_name = create_engine('mysql://root:@localhost:3306/webpy?

# 创建会话

from sqlalchemy.orm import sessionmaker

Session = sessionmaker(bind=engine_name)

session = Session() # 实例化session