Python在"while True“中一直要求提供raw_input

Question

我需要python不断询问raw_input答案是否与1或2不同。

下面是示例：

print """What do you want me to do?

1) Press 1 if you want to .....
2) Press 2 if you want to ....."""

while True:
    answer1 = raw_input(" => ")

    if (answer1 == 1):
        ....
        ....

    elif (answer1 == 2):
        ....
        ....

    elif (answer1 != 1 or 2) or answer1.isalpha():
        print "I need 1 or 2"

问题是，如果用户输入1或2，python也会一直询问raw_input，我哪里错了？

Answer 1

如果answer为1或2，则应在if和elif块中放入一条break语句以中断while循环。

示例：

if (answer1 == 1):
    ....
    ....
    break
elif (answer1 == 2):
    ....
    ....
    break