#improt time module for count down puase time

import time

#set var for loop counting

counter=1

#login setting

while counter<=3:

    print('please enter username: ')

    username=input()

    print('please enter password: ')

    password=input()

    #dict for username and password

    userinf={

        'xiaoweilai':'xiaoweilai',

        'python':'',

        'education':'edu123'

    }

    #different entering cases

    if userinf.__contains__(username) and userinf.get(username)==password:

        print('welcome to python world')

        break

    else:

        print("username/password's error","please try again")

        counter=counter+1

        #error entering for 3 times and forcely stop 10senconds.

        if counter==3:

            print('You try it too much times.')

            counter = 0

            while counter <= 10:

                print(10 - counter)

                time.sleep(1)

                counter = counter + 1

            counter=0

        continue