Python逻辑运算符优先级 [英] Python logical operator precedence

问题描述

哪个运算符在4 > 5 or 3 < 4 and 9 > 8中具有优先权?这将被评估为真还是假?

Which operator takes precedence in 4 > 5 or 3 < 4 and 9 > 8? Would this be evaluated to true or false?

我知道语句3 > 4 or (2 < 3 and 9 > 10)显然应该为false，但是我不太确定python如何读取4 > 5 or 3 < 4 and 9 > 8

I know that the statement 3 > 4 or (2 < 3 and 9 > 10) should obviously evaluate to false but I am not quite sure how python would read 4 > 5 or 3 < 4 and 9 > 8

推荐答案

比较在and之前执行，而在and之前执行.您可以在表达式文档中查找每个运算符的优先级.

Comparisons are executed before and, which in turn comes before or. You can look up the precedence of each operator in the expressions documentation.

因此您的表达式被解析为:

So your expression is parsed as:

(4 > 5) or ((3 < 4) and (9 > 8))

哪个归结为:

False or (True and True)

是True.

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