Python - 在使用 raw_input() 时遇到一些问题

Question

所以我一直在研究一个两人“猜数字”程序。但我只是遇到了一件事。

代码如下:

import time
import random
thenumber = random.randint(1, 10)
print "Welcome to Noah's Two Player guess a number game."
print "What is player one's name?"
player1 = raw_input()
print "What is player two's name?"
player2 = raw_input()
print "Well " + player1 + " and " + player2 + ", are you ready to play?"
choice = raw_input()
if choice == yes:
    print player1 + ", pick a number from 1 to 10."
    player1guess = raw_input()

    print player2 + ", pick a number from 1 to 10."
    player2guess = raw_input()

    print "Calculating..."
    time.sleep(3)

    p1 = thenumber - player1guess
    p2 = thenumber - player2guess

    if p1 > p2:
        print player1 + " won!"

    elif p2 > p1:
        print player2 + " won!"

在出现此错误之前，一切都运行顺利:

Traceback (most recent call last):
  File "C:\Python27\Script 1", line 11, in <module>
    if choice == yes:
NameError: name 'yes' is not defined

据我所知，我不认为我做错了什么，但话又说回来，我是 python 的初学者。

有人请帮助我。

编辑:(如果有所不同，这是 python 2.7)

Answer 1

我猜你需要在 yes 周围加引号:choice =='yes' ，否则 python 会认为 yes 是一个变量。