Python IF多个“和” "或"在一个声明中 [英] Python IF multiple "and" "or" in one statement

问题描述

我只是想知道以下if语句是否有效：

I am just wondering if this following if statement works:

    value=[1,2,3,4,5,f]
    target = [1,2,3,4,5,6,f]
    if value[0] in target OR value[1] in target AND value[6] in target:
       print ("good")

我的目标是确保以下2个要求是所有人都在同一时间遇到：
1.值[6]必须在目标
2.目标
中的值[0]或值[1]如果我做了一个坏的例子，请道歉但我的问题是，如果我可以制作三个AND&还是在一个声明中？非常感谢！

My goal is to make sure the following 2 requirements are all met at the same time: 1. value[6] must be in target 2. either value[0] or value[1] in target Apologize if I made a bad example but my question is that if I could make three AND & OR in one statement? Many thanks!

推荐答案

使用括号对条件进行分组：

if value[6] in target and (value[0] in target or value[1] in target):

请注意，如果要定义<$，可以在查找中以查找。 c $ c> target 作为一组：

Note that you can make the in lookups in constant time if you would define the target as a set:

target = {1,2,3,4,5,6,f}

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并且，as @Pramod在评论中提到，在这种情况下 value [6] 会导致 IndexError ，因为只有6在值中定义的元素，索引从0开始。

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And, as mentioned by @Pramod in comments, in this case value[6] would result in an IndexError since there are only 6 elements defined in value and indexing is 0-based.

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