为mysqldb python设置标志

Question

我的目标是防止我的数据库中的“学生”被更改，除非“老师”首先登录。我在创建一个可以做到这一点的旗帜时遇到了麻烦。 function1适用于学生，function2适用于教师

我想要的是：

教师首先登录＆gt;标志设置为允许学生登录＆gt;学生登录。

如果教师尚未登录。学生们不能。我该怎么做？

import MySQLdb as mysql
one = 0
mydb = mysql.connect(host= "192.168.1.10", user= "XXXX", passwd= "XXXX", db= "XXXX")
cur = mydb.cursor()      
def function1():
  with mydb:
    receiver = raw_input("just waiting for an RFID: ")
    cur.execute("SELECT * FROM users")
    rows = cur.fetchall()
    for row in rows:
      if(receiver == row[4]):
        cur.execute(" UPDATE users SET status= '1' where RFID =%s ",(receiver))

def function2():
  with mydb:
    receiver = raw_input("just waiting for an RFID: ")
    cur.execute("SELECT * FROM users")
    rows = cur.fetchall()
    for row in rows:
      if(receiver ==  row[4] and row[3] == 1):
        cur.execute(" UPDATE users SET status = '1', status2= '1' where RFID = %s ",(receiver))