使用者登入（三次機會）

i = 3
username = 'zhourui'
password = 123
while i>0:
    i -= 1
    name = input('請輸入使用者名：')
    while name == username:
        word = int(input('請輸入密碼：'))
        if word == password:
            print('登陸成功')
            break
        else:
            print('密碼錯誤，你還有'+str(i)+'次機會')
            if i == 0:
                print('機會用完，登陸失敗')
                ask = input('再試試？Y')
                if ask == 'Y':
                    i = 2
                    continue
                break
            i -= 1
            continue
    break
    if name != username:
        print('使用者名錯誤，你還有'+str(i)+'次機會')
        if i == 0:
            print('機會用完，登陸失敗')
            ask = input('再試試？Y')
            if ask == 'Y':
                i = 2
                continue
            break      

轉載于:https://www.cnblogs.com/aj-AJ/p/10709852.html