输入内部的打印语句返回"none"(无). [英] print statement inside of input returns with a "none"
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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,除了它在打印打印语句后说什么都没有的事实.像:
This works well except for the fact that after it prints the print statement it says none. like:
49 x 7 =
None
如果可能的话,如何删除无"?我也确实搜索了这个问题,但是什么也没有在输入中返回none.
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
prompt
字符串作为其参数,它将自动打印,但是print
返回None
;这是由input
打印的.您的代码等效于:
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))
相反,请使用 str.format
构建提示并将其直接传递给input
:
ans = int(input('{0}x{1}='.format(multi, num)))
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