= + Python运算符在语法上是正确的 [英] =+ Python operator is syntactically correct

问题描述

我不小心写了:

total_acc =+ accuracy

代替:

total_acc += accuracy

我在网上搜索，找不到任何东西.那么发生了什么，为什么Python认为我的意思是我要输入的内容?

I searched the net and could not find anything. So what happened, why does Python think I mean what I am typing?

_{计算机太信任我们了. :)}

推荐答案

这与您要像total_acc = -accuracy一样，只不过是正面的而不是负面的.不过，它基本上与total_acc = accuracy相同，因为在值之前添加+不会更改它.

This is the same as if you were to do like total_acc = -accuracy, except positive instead of negative. It basically is the same as total_acc = accuracy though, as adding a + before a value does not change it.

这称为一元运算符，因为只有一个参数(例如:+a)而不是两个参数(例如:a+b).

This is called an unary operator as there is only one argument (ex: +a) instead of two (ex: a+b).

此链接对其进行了详细说明.

This link explains it a little more.

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