学生管理系统

import sqlalchemy
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String,DATE,Table,ForeignKey,FLOAT
from sqlalchemy.orm import relationship
engine = create_engine("mysql+pymysql://root:12@10.30.208.36/learn",encoding='utf-8', echo=True)
Base = declarative_base()

stu_m2m_class = Table('stu_m2m_class', Base.metadata,
Column('stu_id',Integer,ForeignKey('student.stu_id')),
Column('class_id',Integer,ForeignKey('class.class_id')),
)

class Stundent(Base):
__tablename__ = 'student'
stu_id = Column(Integer, primary_key=True)
name = Column(String(32), nullable=False)
qq = Column(Integer)

class Class(Base):
__tablename__ = 'class'
class_id = Column(Integer, primary_key=True)
programe = Column(String(32), nullable=False)
lesson_record = Column(String(32))
day = Column(DATE)

class Score(Base):
__tablename__ = 'score'
id = Column(Integer, primary_key=True)
stu_id = Column(Integer, ForeignKey("student.stu_id"))
class_id = Column(Integer, ForeignKey("class.class_id"))
class_day = Column(Integer, ForeignKey("class.day"))
score = Column(FLOAT)
fk_stu_id = relationship("Stundent", foreign_keys=[stu_id])
fk_class_id = relationship("Class", foreign_keys=[class_id])
fk_class_day = relationship("Class", foreign_keys=[class_day])

Base.metadata.create_all(engine)