---------------edit-in-windows-by-pycharm---------------------
import random
uname = "mologa"
psword = "mologa2016"
times = int(random.randint(0,2))
#dict = {uname:‘mologa‘,psword:‘mologa2016‘}

while times < 3:
    username = input("please you name:")
    if username == uname:
        while times < 3:
            password = input("please enter your password:")
            if password == psword:
                print("welcome login!")
            else:
                key = input("do you want to try again!")
                if key == ‘yes‘ or key == ‘y‘:
                    times += 1
                    continue
                else:
                   # print("bye-bye!^_^")
                    pass
            break
    else:
        print("user no exits")
        key = input("do you want to chang again")
        if key == ‘yes‘ or key == ‘y‘:
            continue
        else:
            print("bye-bye!^_^")
    break
if times >= 3:
    print("sorry!user is locked.")
    print(times

--------------------test-1------------------------

F：\Python35\python.exe F:/mologa-workspace/two.py
please you name:1231
user no exits
do you want to chang againy
please you name:wd23d2
user no exits
do you want to chang againy
please you name:12edd23d
user no exits
do you want to chang againy
please you name:df2qdf34f
user no exits
do you want to chang againy
please you name:mologa
please enter your password:f23d
do you want to try again!y
sorry!user is locked.
3

Process finished with exit code 0

--------------------test-2------------------------

F:\Python35\python.exe F:/mologa-workspace/two.py
please you name:mologa
please enter your password:df23r3
do you want to try again!y
please enter your password:d23dfa
do you want to try again!y
please enter your password:f23frawf
do you want to try again!y
sorry!user is locked.
3

Process finished with exit code 0

--------------------test-3------------------------

F:\Python35\python.exe F:/mologa-workspace/two.py
please you name:mologa
please enter your password:mologa2016
welcome login!

Process finished with exit code 0

谢谢！小组导师罗大帅给我提示了一个while循环内的参数pass，迈出了第一步，非常感谢！