sqlalchemy关于时间的数据类型

#导入模块
from sqlalchemy import Column, Integer, String, Date, create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
import datetime
import random

Base = declarative_base()

starttime=datetime.datetime.now()

class User(Base):
    __tablename__ = 'user'
    id = Column(Integer, primary_key=True, nullable=False,autoincrement=True)
    name = Column(String(20), nullable=False)
    age = Column(Integer)
    #这里需要用Date类型
    time = Column(Date)
    #mysql user表中的time类型为datatime

engine = create_engine('mysql+pymysql://root:password@localhost:3306/test')
DBsession = sessionmaker(engine)
session = DBsession()

newUser=User(name='张三', age='',time=datetime.datetime.now())
session.add(newUser)
session.commit()
session.close()

表结构中 time的类型要写为Date,如果写为Time将会报错。