Python 2.7 硬币翻转程序每次都崩溃

Question

我在一个简单的硬币翻转程序中遇到了这个奇怪的问题，当我运行此代码时，它并没有给我某种错误，而是发生了某种崩溃。我输入是或否的答案，然后按回车，但它什么也没做。然后我再次按回车，它完全关闭了。

import time
import random

constant = 1
FirstRun = True

def Intro():
    raw_input("Hello and welcome to the coin flip game. Do you wish to flip a coin? (yes or no): ")


def CoinToss():
    print "You flip the coin"
    time.sleep(1)
    print "and the result is..."
    time.sleep(1)
    result = random.randint(1,2)
    if result == 1:
        print "heads"
    if result == 2:
        print "tails"


while constant == 1:
    if FirstRun == True:
        Intro()
        FirstRun = False

    else:
        answer = raw_input()
        if answer == "yes":
            CoinToss()
            raw_input("Do you want to flip again? (yes or no): ")
        else:
            exit()

Answer 1

由于您只是忽略了raw_input 方法的返回值，因此您不知道用户输入了什么以跳出循环。

这是您程序的简化版本，请注意我如何将 raw_input 方法的结果存储在 result 中并使用它来控制执行循环：

import random
import time

result = raw_input('Hello and welcome to the coin flip game. Do you wish to flip a coin? (yes or no): ')

while result != 'no':
    print('You flip the coin....')
    time.sleep(1)
    print('...and the result is...')
    toss_result = random.randint(1,2)
    if toss_result == 1:
        print('Heads')
    else:
        print('Tails')

    result = raw_input('Do you want to flip again? (yes or no): ')

print('Goodbye!')