如何使用ORM库将python模块与mysql Alchemy集成

pip install sqlalchemy

from sqlalchemy import create_engine

# 创建一个引擎对象，连接MySQL数据库
engine = create_engine('mysql://username:password@host:port/database')

from sqlalchemy.orm import sessionmaker

# 创建一个会话对象
Session = sessionmaker(bind=engine)
session = Session()

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String

# 创建一个基类
Base = declarative_base()

# 定义一个模型类
class User(Base):
    __tablename__ = 'users'

    id = Column(Integer, primary_key=True)
    name = Column(String(50))
    age = Column(Integer)

# 插入数据
user = User(name='Alice', age=25)
session.add(user)
session.commit()

# 查询数据
users = session.query(User).all()
for user in users:
    print(user.name, user.age)

# 更新数据
user = session.query(User).filter_by(name='Alice').first()
user.age = 26
session.commit()