SQLAlchema，Python我想从一天开始到一天结束按创建日期过滤我的模型

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

# 创建数据库连接
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()

# 定义模型类
class Model(Base):
    __tablename__ = '表名'
    id = Column(Integer, primary_key=True)
    created_at = Column(DateTime)

# 创建会话
session = Session()

# 按照创建日期过滤模型
start_date = '开始日期'
end_date = '结束日期'
filtered_models = session.query(Model).filter(Model.created_at >= start_date, Model.created_at <= end_date).all()

# 打印过滤后的模型
for model in filtered_models:
    print(model)

# 关闭会话
session.close()