Python 7 Levels, L3, Unit 27, Mimic Banking System II

Exercise:

import easygui as g
card1_num = "1001"
card1_pwd = "123456"
card1_money = 0
card2_num = "1002"
card2_pwd = "234567"
card2_money = 100
times = 0
while True:
    card = g.multpasswordbox("Please input card number and pin",title = "Banking System",fields = ("Card Number","PIN"))
    money = 0
    flag = 0#标记
    if card == [card1_num,card1_pwd]:
        money = card1_money
        flag == 1
        g.msgbox("Login Successfully.",title = "Banking System")

    elif card == [card2_num,card2_pwd]:
        flag = 2
        money = card2_money
        g.msgbox("Login Successfully.",title = "Banking System")
    else:
        times += 1
        if times == 3:
            g.msgbox("You have entered wrong password for 3 times. Please contact with the Bank Admin.",title = "Banking System")
            pwd = ""
            while pwd != "888888":
                pwd = g.passwordbox("Please input Admin's password:",title = "Banking System")
                times = 0
        else:
            g.msgbox("Login failed. Please re-enter:", title="Banking System")
        continue
    while True:
        operation = g.buttonbox("Please pick your operation", choices=("Deposit", "Withdraw", "Balance", "Quit"))
        if operation == "Quit":
            times = 0
            if flag == 1:
                card1_money = money
            elif flag == 2:
                card2_money = money
            break
        elif operation == "Deposit":
            save_money = g.integerbox("Please how much will you deposit:", lowerbound=0, upperbound=1000000)
            money = money + save_money
            g.msgbox("Deposit successfully. Money deposit is " + str(save_money))
        elif operation == "Withdraw":
            get_money = g.integerbox("Please input how much will you withdraw.", lowerbound=0, upperbound=1000000)
            if get_money > money:
                g.msgbox("Sorry no enough balance. Operation failed.")
            else:
                money = money - get_money
                g.msgbox("Withdraw successfully. Money withdrew is " + str(get_money))
        elif operation == "Balance":
            g.msgbox("Your balance is " + str(money))