使用For循环实现Python和SQLAlchemy数据库内容的打印

from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

# 创建数据库引擎
engine = create_engine('sqlite:///example.db', echo=True)
Base = declarative_base()

# 定义模型类
class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    age = Column(Integer)

# 创建表
Base.metadata.create_all(engine)

# 创建会话
Session = sessionmaker(bind=engine)
session = Session()

# 插入一些示例数据
session.add_all([
    User(name='Alice', age=30),
    User(name='Bob', age=25),
    User(name='Charlie', age=35)
])
session.commit()

# 使用For循环打印所有用户信息
for user in session.query(User).all():
    print(f'ID: {user.id}, Name: {user.name}, Age: {user.age}')

# 关闭会话
session.close()