Question

users = {'adam' : 'Test123', 'alice' : 'Test321'}
status = ""
status = input("If you have an account, type YES, NO to create a new user, QUIT to exit: ")

while status != 'QUIT':

    if status == "YES":
        u_name = input("Please provide your username: ")
        u_pwd = input("Please provide your password: ")

        if users.get(u_name) == u_pwd:
            print("Access granted!")
            break

        else:
            print("User doesn't exist or password error! You have 2 more attempts!")

    elif status == "NO":
        print("\nYou're about to create a new user on my very first app. Thank you!")
        new_u_name = input("Please select a name for your account!")
        new_u_pwd  = input("Please select a password for your account!")
        users[new_u_name] = new_u_pwd
        print("Thank you " + new_u_name + " for taking the risk.")

    elif status == "QUIT":
        print("Smart choice lol. Please come back in few months")

实现以下内容的过去方式是什么： - 如果用户选择YES并提供有效的用户名+ pwd =访问授予退出循环（在这种情况下我使用了break） - 我将如何实现循环，以便在第一个else语句之后再次要求用户输入用户名和密码，但仅用于另外2次尝试？

Answer 1

我猜你可以创建一个计数器，例如：

library(lubridate)
library(dplyr)

times %>% 
  mutate(diff_time1 = ms(end_time) - ms(start_time)) %>%
  mutate(diff_time2 = as.numeric(diff_time1)) %>%
  mutate(diff_time1 = gsub("M ", "'", diff_time1)) %>% 
  mutate(diff_time1 = gsub("S", "\"", diff_time1))

  start_time end_time diff_time1 diff_time2
1     12'10"   16'23"      4'13"        253
2      1'05"   76'20"     75'15"       4515
3     96'10"  120'22"     24'12"       1452

备注：

您可能还想实现以下功能：

1 - 在提示输入密码之前，检查用户名是否退出 2 - 使users = {'adam' : 'Test123', 'alice' : 'Test321'} status = "" status = input("If you have an account, type YES, NO to create a new user, QUIT to exit: ") max_attempts = 2 while status != 'QUIT': if status == "YES": u_name = input("Please provide your username: ") u_pwd = input("Please provide your password: ") if users.get(u_name) == u_pwd: print("Access granted!") break else: if max_attempts > 0: print("User doesn't exist or password error! You have {} more attempts!".format(max_attempts)) max_attempts -= 1 else: print("Too many wrong passwords. Bye!") break elif status == "NO": print("\nYou're about to create a new user on my very first app. Thank you!") new_u_name = input("Please select a name for your account!") new_u_pwd = input("Please select a password for your account!") users[new_u_name] = new_u_pwd print("Thank you " + new_u_name + " for taking the risk.") elif status == "QUIT": print("Smart choice lol. Please come back in few months")和YES案例InsEnsiTive。

python用户名和密码限制验证x次尝试

1 个答案: