从sqlalchemy查询结果获取对象类datetime

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

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

Base = declarative_base()

class MyTable(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    created_at = Column(DateTime)

result = session.query(MyTable).filter(MyTable.name == 'example').first()

datetime_obj = result.created_at