問題描述

1.寫了一段使用SQLAlchemy 編程的代碼，程序本身沒問題，就是訪問數據庫時產生一個錯誤提示，但是即使有錯誤代碼頁能正常運行，操作結果也正確。這個錯誤是關于代碼編碼方式的錯誤，但是調了很長時間這個錯誤就是不能消除，求解救

2.這里是代碼：（1）orm.py

from sqlalchemy.ext.declarative import declarative_basefrom sqlalchemy import Column,Integer,StringBase = declarative_base()class Account(Base): __tablename__ = u’account’ id = Column(Integer,primary_key = True) salary = Column(Integer) username = Column(String(20),nullable = False) password = Column(String(200),nullable = False) title = Column(String(50))def is_active(self):return True def get_id(self):return self.id def is_authenticated(self):return True def is_anonymous(self):return Falsefrom sqlalchemy import create_enginefrom sqlalchemy.orm import scoped_session,sessionmakerdb_connect_string = ’mysql://root:admin@localhost:3306/test_database?charset=utf8’ssl_args = {’ssl’:{’cert’:’/home//ssl/client-cert.pem’, ’key’:'/home/shouse/ssl/client-cert.pem', ’ca’:’/home/shouse/ssl/ca-cert.pem’}}engine = create_engine(db_connect_string,connect_args = ssl_args)SessionType = scoped_session(sessionmaker(bind = engine,expire_on_commit = False))def GetSession(): return SessionType()from contextlib import contextmanager@contextmanagerdef session_scope(): session = GetSession() try:yield sessionsession.commit() except:session.rollback()raise finally:session.close()

（2）databaseoperation.py代碼：

# -*- coding:utf-8 -*-import ormfrom sqlalchemy import or_def InsertAccount(user,password,title,salary): with orm.session_scope() as session:account = orm.Account(username = user,password =password,title = title,salary = salary)session.add(account)def GetAccount(id=None,username = None): with orm.session_scope() as session:return session.query(orm.Account).filter(or_(orm.Account.id==id,orm.Account.username==username)).first()def Delete(username): with orm.session_scope() as session:account = GetAccount(username = username) if account: session.delete(account)def Update(id,username,password,title,salary): with orm.session_scope() as session:account = session.query(orm.Account).filter(orm.Account.id==id).first()if not account:returnaccount.username=usernameaccount.password=passwordaccount.title = titleaccount.salary = salaryInsertAccount(’Lliy’,’123’,’System Manager’,3000)InsertAccount(’Rebeca Li’,’12221’,’Accountant’,3000)GetAccount(2)Delete(’David Li’)Update(1,’admin’,’1111’,’System Admin’,2000)

3.錯誤提示：

4.數據庫截圖

問題解答

這是一個警告Warning，而不是錯誤Error，但是不知道觸發那種機制導致代碼反饋這種警告Warning