The number of password errors during login is too many, and the user is blocked,

This article describes an example when a user is 3 Password input error within minutes exceeds 5 Time , Block the current user 30 You cannot log in within minutes

    async def get(self):
        # Get the front-end parameters 
        email = self.get_argument("email",None)
        password = self.get_argument("password",None)
        # Get counter   redis
        number = self.application.redis.get("num_%s" % email)

        try:
            if self.application.redis.get("black_" + email):
                return self.finish({"msg": " It has been banned. Try again later ", "errcode": 4})
            # If there is    redis
            if number:
                if int(number) > 4:
                    self.application.redis.setex("black_"+email,1800,1)
                    return self.finish({"msg": " It has been banned. Try again later ", "errcode": 5})

                    # Verify the account and password 
            user = await self.application.objects.get(UserModel.select().where((UserModel.email==email) & (UserModel.password == make_password(password))))

            # Determine whether to activate 
            if user.srare ==0:
                return self.finish({"msg":" Please activate this user ","errcode":2})

                # write in token
            myjwt = Myjwt()
            token = myjwt.encode({"uid":user.id,"email":user.email})
            return self.finish({"msg":" Login successful ","errcode":0,"email":user.email,"token":token})
        except Exception as e:
            if number:
                self.application.redis.incr("num_%s"%email)
            else:
                self.application.redis.setex("num_%s"%email,180,1)
            return self.finish({"msg":" Incorrect account or password ","errcode":3})