如何删除sqlalchemy中重复的行

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

Base = declarative_base()

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

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.sql import func

engine = create_engine('数据库连接字符串')
Session = sessionmaker(bind=engine)
session = Session()

duplicate_emails = session.query(User.email, func.count(User.email)).group_by(User.email).having(func.count(User.email) > 1).all()

for email, count in duplicate_emails:
    duplicate_users = session.query(User).filter(User.email == email).all()
    for user in duplicate_users[1:]:
        session.delete(user)

session.commit()