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  • 使用SQLAlchemy

    参考:https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/0014320114981139589ac5f02944601ae22834e9c521415000

    # coding: utf-8
    import pymysql
    pymysql.install_as_MySQLdb()
    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from sqlalchemy.ext.declarative import declarative_base
    from sqlalchemy import Column, String, Integer
    
    Base = declarative_base()
    
    # 定义User对象:
    class BaaUser(Base):
        # 表的名字:
        __tablename__ = 'baa_user'
    
        # 表的结构:
        id = Column(String(20), primary_key=True)
        name = Column(String(20))
        age = Column(Integer)
        work=Column(String(100))
        def __str__(self):
            return 'User(id={}, name={}, age={}, work={})'.format(self.id, self.name, self.age, self.work)
    
    #连接数据库
    def getEngine():
        engine = create_engine('mysql://root:123456@127.0.0.1/baa?charset=utf8')
        #print(engine)
        return engine
    
    def getSession():
        engine = getEngine()
        Base.metadata.create_all(engine)
        Session = sessionmaker(bind=engine)
        session = Session()
        return session
    
    #创建
    def createUser():
        usr = BaaUser(id='05', name='ts', age=35, work="teacher")
        # session.add(usr)
        session=getSession()
        session.add(usr)
    
        try:
            session.commit()
        except Exception as e:
            session.rollback()
            raise e
    
    #查询
    def getUser():
        # 创建Session:
        session = getSession()
        # 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(BaaUser).filter(BaaUser.id == '03').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()
    
    # createUser()
    getUser()
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  • 原文地址:https://www.cnblogs.com/quietwalk/p/10298094.html
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