python - 如何在Python中重复石头、剪刀、布的游戏

Question

我用Python做了一个石头、剪刀、布的游戏。如果用户输入"is"，我如何让游戏重复进行？当用户输入除了石头、布或剪刀之外的任何内容时，我的代码似乎进入永无休止的循环

此外，我正在尝试了解何时何地应该使用函数。如果您能展示一种 Pythonic 方法将完成的代码分离为函数，我将不胜感激。

import random

a = ["rock", "paper", "scissors"]

word = input('Enter rock, paper, or scissors: ')

def game():
    while True:
        try:
            if word not in a:
                raise ValueError #this will send it to the print message and back to the input option
            break
        except ValueError:
            print(" You must enter rock, paper, or scissors.")


    comp_draw = random.choice(a)
    print('The computer drew ' + comp_draw)

    if comp_draw == 'rock' and word=='rock':
        print('It was a tie')
    elif comp_draw == 'paper' and word=='paper':
        print('It was a tie')
    elif comp_draw == 'scissors' and word=='scissors':
        print('It was a tie')

    elif comp_draw == 'paper' and word=='rock':
        print('you lost')
    elif comp_draw == 'rock' and word=='paper':
        print('you won!')

    elif comp_draw == 'rock' and word=='scissors':
        print('you lost')
    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')

    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')
    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')

game()


play_again = input('would you like to play again: ')

Answer 1

没有遗漏太多，你所需要的只是一个循环

import random

a = ["rock", "paper", "scissors"]

word = input('Enter rock, paper, or scissors: ')

def game():
    while True:
        try:
            if word not in a:
                raise ValueError #this will send it to the print message and back to the input option
            break
        except ValueError:
            print(" You must enter rock, paper, or scissors.")


    comp_draw = random.choice(a)
    print('The computer drew ' + comp_draw)

    if comp_draw == 'rock' and word=='rock':
        print('It was a tie')
    elif comp_draw == 'paper' and word=='paper':
        print('It was a tie')
    elif comp_draw == 'scissors' and word=='scissors':
        print('It was a tie')

    elif comp_draw == 'paper' and word=='rock':
        print('you lost')
    elif comp_draw == 'rock' and word=='paper':
        print('you won!')

    elif comp_draw == 'rock' and word=='scissors':
        print('you lost')
    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')

    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')
    elif comp_draw == 'scissors' and word=='rock':
        print('you won!')


play_again = "yes"

while play_again == "yes":

    game()

    play_again = input('would you like to play again: ').lower()