Python的逻辑运算符AND [英] Python's Logical Operator AND

问题描述

我对使用Python中的逻辑运算符获得的结果感到有些困惑.我是一个初学者，正在研究一些书籍，但是它们并没有像我所希望的那样详尽地解释.

I'm a little confused with the results I'm getting with the logical operators in Python. I'm a beginner and studying with the use of a few books, but they don't explain in as much detail as I'd like.

这是我自己的代码:

five = 5
two = 2

print five and two

>> 2

似乎只是输出两个变量.

It seems to be just outputting the two variable.

five = 5
two = 2
zero = 0

print five and two and zero

因此，我添加了另一个变量整数.然后我打印并得到以下输出:

So, I added another variable integer. Then I printed and got the following output:

>> 0

Python在后台发生了什么?为什么输出的不是7或5、2之类的.

What is going on with Python in the background? Why isn't the output something like 7 or 5, 2.

推荐答案

Python布尔运算符返回最后计算的值，而不是True/False. 文档对此有很好的解释:

Python Boolean operators return the last value evaluated, not True/False. The docs have a good explanation of this:

表达式x and y首先计算x;如果x是false，则返回其值；否则，将评估y并返回结果值.

The expression x and y first evaluates x; if x is false, its value is returned; otherwise, y is evaluated and the resulting value is returned.

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