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      输入中的 print 语句返回“none"

      print statement inside of input returns with a quot;nonequot;(输入中的 print 语句返回“none)
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                本文介绍了输入中的 print 语句返回“none"的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                我正在开发一个小程序,我想使用:

                I am working on a little program and I want to use:

                ans = int(input(print(multi,'x',num,'=')))
                

                这很好用,除了在打印 print 语句后它说 none 之外.喜欢:

                This works well except for the fact that after it prints the print statement it says none. like:

                49 x 7 =
                None
                

                如果可能,如何删除无"?我也搜索了这个问题,但没有什么是关于在输入中返回 none 的.

                How would on remove the "none" if possible? Also I did search this problem but nothing was about returning a none inside of an input.

                推荐答案

                inputprompt 字符串作为参数,它会自动打印,但 print 返回 None;这是由 input 打印的.您的代码相当于:

                input takes a prompt string as its argument, which it will print automatically, but print returns None; it is this that gets printed by input. Your code is equivalent to:

                prompt = print(...) # prompt == None
                ans = int(input(prompt)) 
                

                改为使用 str.format 构建提示并将其直接传递给 input:

                ans = int(input('{0}x{1}='.format(multi, num)))
                

                这篇关于输入中的 print 语句返回“none"的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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