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from datetime import datetimefrom sqlalchemy.ext.declarativeimport declarative_basefrom sqlalchemy import Column, Integer, String, DateTimeBase = declarative_base()class UserInfo(Base): __tablename__ = 'userinfo' id = Column(Integer, primary_key=True, autoincrement=True) name = Column(String(64), unique=True) ctime = Column(DateTime, default=datetime.now())