菜单循环Python不起作用

Question

如何在菜单上循环其他问题？

到目前为止，我有：

loop()

selection=raw_input('How Many Apples (limit 3): ')
print ' '
if selection=='1':
    p = a
    print '<1 Apple added to Cart>'
    break
elif selection=='2':
    p = a*2
    print '<2 Apples added too Cart>'
    break
elif selection=='3':
    p = a*3
    print '<3 Apples added too Cart>'
    break
else:
    print '[try again]'

我想将else选项循环回到顶部，所以如果人们选择不在列表中的选项，它会再次询问！

Answer 1

你几乎就在那里

while True:
    selection=raw_input('How Many Apples (limit 3): ')
    print ' '
    if selection=='1':
        p = a
        print '<1 Apple added to Cart>'
        break
    elif selection=='2':
        p = a*2
        print '<2 Apples added too Cart>'
        break
    elif selection=='3':
        p = a*3
        print '<3 Apples added too Cart>'
        break
    else:
        print '[try again]'