无法提交()使用sqlalchemy更新的数据找不到错误之处

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

Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)

# 创建数据库引擎
engine = create_engine('sqlite:///example.db')
Base.metadata.create_all(engine)

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

# 查询并更新数据
user = session.query(User).filter_by(id=1).first()
if user:
    user.name = 'New Name'
    session.commit()  # 提交事务
else:
    print("User not found")

# 关闭会话
session.close()