Python变量字符串错误

Question

这个问题已经有答案了:

What is wrong with the syntax with line 7 in my code? It says my print statement has invalid syntax and I can't figure it out? (2 个回答)

已关闭 2 年前。

我将一个变量放入打印语句中，但收到此错误消息:

Traceback (most recent call last):
  File "C:\Users\Samuel\workspace\First Python Project\com\fireboxtraining\Person.py", line 13, in <module>
    print("Dude, %s is not yes or no... come on.") % (game)
TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'

这是我的代码:

    '''
Created on Apr 17, 2017

@author: Samuel
'''
game = input("Would you like to play a game? Please answer with \"Yes\" or \"No\".")
game = game.lower()
if game == "yes":
    print("Great! Let's play.")
elif game == "no":
    print("Ok, I guess we won't play.")
else: 
    print("Dude, %s is not yes or no... come on.") %(game)

我刚刚学习Python，我不明白为什么这不起作用。请帮忙!

Answer 1

这是一个简单的括号被关闭。你有:

print("Dude, %s is not yes or no... come on.") %(game)

应该是:

print("Dude, %s is not yes or no... come on." % (game) )