如何在python中用SQLalchemy过滤SQL表中的datetime列？

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

# 创建数据库引擎
engine = create_engine('数据库连接字符串')

# 创建会话工厂
Session = sessionmaker(bind=engine)

# 创建基类模型
Base = declarative_base()

# 定义数据模型类
class MyTable(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    created_at = Column(DateTime)

# 过滤datetime列
session = Session()
datetime_filter = datetime(year=2022, month=1, day=1)  # 设置过滤条件
result = session.query(MyTable).filter(MyTable.created_at > datetime_filter).all()

# 输出结果
for row in result:
    print(row.name, row.created_at)

# 关闭会话
session.close()