Question

这是代码：

quiz = str(input("would you like to answer some questions \n choose y/n"))

quiz = quiz.lower()
while quiz != 'y' or quiz != 'n':
    print("please choose 'y' or 'n'")
    input("y/n?")

这是我尝试使用str()的代码的一部分，即使没有or操作数也无法正常工作，而我正在使用python v3.7。

1）如果可以，请修复代码

2）如果您知道其他一些代码更有效，请告诉我们

注：如果输入为y。＃例如错误是" ValueError: float: Argument: y is not a number "

Answer 1

输入查找整数，原始输入将接收字符串。尝试使用

raw_input(y/n)

这应该清除ValueError

Answer 2

也许是这样吗？

def check_input(predicate, msg, error_string="Illegal Input"):
    while True:
        result = input(msg).strip()
        if predicate(result):
            return result
        print(error_string)

result = check_input(lambda x: x in ['yes', 'no'],
                                   'Yes or no?')
print(result)

从here被盗

Answer 3

//This code is for explanation 

quiz = str(input("would you like to answer some questions \n choose y/n"))

quiz = quiz.lower()

while quiz != 'y' and quiz != 'n': //here you are using != that will result false this logic works fine with !

//while quiz == 'y' or quiz == 'n': //will work for or

print("please choose 'y' or 'n'")

input("y/n?")

//this code will work 

quiz = str(input("would you like to answer some questions \n choose y/n"))

quiz = quiz.lower()

while quiz != 'y' and quiz != 'n':

   print("please choose 'y' or 'n'")

   input("y/n?")

我希望这会有所帮助。

您可能对流程图或算法感兴趣，请点击以下链接：https://www.edrawsoft.com/explain-algorithm-flowchart.php

您可能还想进一步了解python，请点击以下链接：https://www.python.org/about/gettingstarted/

谢谢。

while循环输入是/否（Python 3）

3 个答案: