Question

我目前正在编写一个关于Python上的货币转换器的程序，我在最后阶段需要帮助我问一个问题＆＃34;你想再转换一次＆＃34;如果答案以＆＃34; n＆＃34;开头然后我写了一条消息，程序退出。问题是我希望程序重新启动，如果用户想再次转换＆＃34;。我需要定义如何重新启动程序，但我不确定如何。最后，如果用户写了除“＆＃34; y＆＃34;或＆＃34; n＆＃34;非常感谢帮助。到目前为止它看起来像这样：

def restart_programme
answer=str(input('Do you want to convert again?'))
if answer.lower().startswith("n"):
    print("Thank you for using Currency Converter today,Goodbye "+name)
    exit()
if answer.lower().startswith("y") or ("Y"):
restart_programme()

Answer 1

将整个程序包含在循环中。

answer = 'y'
while answer.lower().startswith("y"):

    #Whatever you want to do

    answer=str(input('Do you want to convert again?'))

if answer.lower().startswith("n"):
    print("Thank you for using Currency Converter today,Goodbye "+name)
else:
    #The anything else part

OR

将整个程序包含在一个函数中，然后再次调用该函数。

def restart_programme():

    #Whatever you want to do

    answer=str(input('Do you want to convert again?'))
    if answer.lower().startswith("n"):
        print("Thank you for using Currency Converter today,Goodbye "+name)
        exit()
    if answer.lower().startswith("y"):
        restart_programme()

restart_programme()

Answer 2

python 2.7

def restart_programme():
    answer = raw_input('Do you want to convert again? [Y/n]\n')
    if answer.lower().startswith('n'):
        print('Thank you for using Currency Converter today, Goodbye ' + name)
        quit()
    elif answer.lower().startswith('y'):
        restart_programme()
        print ('Debug: Program will now restart\n\n')
    else:
        print('You didnt choose a valid option')
        raw_input('Press Enter to Restart\n')
        restart_programme()

Answer 3

真的没有人在测试过他们的代码之前回答过吗？两者都存在同样的问题。您应该阅读this

def got_milk():
    answer = False
    while not answer:
        milk = raw_input('Got Milk?')
        if not milk in ['N', 'No', 'n', 'no']:
            print 'Thanks'
            answer = True

这可能是您期望做的某些版本：

def restart_programme():
    check = True
    while check:
        answer=raw_input('Do you want to convert again?').lower()
        if answer.startswith("n"):
            print("Thank you for using Currency Converter today, Goodbye")
            check = False
            exit()
        if answer.startswith("y") or answer.startswith("Y"):
            print "Let's have some more fun."

货币转换器/定义restart_program

3 个答案: