尝试将 1 添加到变量并打印它，但它输出相同的数字

Question

    def checked(input, correct):
if input == correct:
    return True
else:
    return False

while True:
    try:
        user_typed = str(raw_input('Type password\n'))
        password = str('test')
        number_of_trys = 0
    if checked(user_typed, password) is True and number_of_trys <= 3:
        print('Welcome User')
        break
    else:
        print("Password is incorrect, please try again.")
        number_of_trys += 1
        print(number_of_trys)
finally:
    print('Loop Complete')

我尝试打印“number_of_trys”，但它一直输出“1”。 是的，我试过 number_of_trys = number_of_trys + 1。

Answer 1

每次你在 try: 中询问密码时，你都将 number_of_trys 设置为 0。在 while 循环之外声明它并在 if 语句中重置它

def checked(input, correct):
    if input == correct:
        return True
    else:
        return False

number_of_trys = 0

while True:
    try:
        user_typed = str(raw_input('Type password\n'))
        password = str('test')
    if checked(user_typed, password) is True and number_of_trys <= 3:
        print('Welcome User')
        number_of_trys = 0
        break
    else:
        print("Password is incorrect, please try again.")
        number_of_trys += 1
        print(number_of_trys)
finally:
    print('Loop Complete')