#-*-coding:utf-8-*-

# pip install sqlalchemy

from sqlalchemy import Column, String, create_engine

from sqlalchemy.orm import sessionmaker

from sqlalchemy.ext.declarative import declarative_base

# 创建对象的基类:

Base = declarative_base()

# 定义User对象:

class User(Base):

#表的名字：

__tablename__ = 'user'

#表的结构：

id = Column(String(20), primary_key = True)

name = Column(String(20))

# 初始化数据库连接:

engine = create_engine('mysql+mysqlconnector://root:123456@localhost:3306/test')

# 创建DBSession类型:

DBSession = sessionmaker(bind=engine)

# 创建session对象:

session = DBSession()

# 创建新User对象:

new_user = User(id='5', name='Bob')

# 添加到session:

session.add(new_user)

# 提交即保存到数据库:

session.commit()

# 关闭session:

session.close()

# 创建Session:

session = DBSession()

# 创建Query查询，

user = session.query(User).filter(User.id=='5').one()

# 打印类型和对象的name属性:

print('type:', type(user))

print('name:', user.name)

# 关闭Session:

session.close()