python mysqlalchemy

#-*- coding:UTF-8 -*-
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:000000@localhost:3306/test')
# 创建DBSession类型:
DBSession = sessionmaker(bind=engine)

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()

# 创建Query查询，filter是where条件，最后调用one()返回唯一行，如果调用all()则返回所有行:
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()

create table user
(
id varchar(20) primary key,
name varchar(20)
);

insert into user (id, name) values ('1', 'Michael')
insert into user (id, name) values ('2', 'Bob')
insert into user (id, name) values ('3', 'Adam')