有没有办法检查一个项目是否存在于 Python 元组中?

2022-01-20 00:00:00 python list tuples collections

问题描述

我见过一个 index 函数，但如果找不到它就会出错.有没有一种简单的方法来检查项目是否存在?我只想获得结果的布尔值，例如:

I have seen an index function but it says it errors out if it can't find it. Is there a simple way to just check if the item exists? I just want to get a boolean value of the result so like:

if tuple.exists("item"):
    print "it exists"

解决方案

使用in操作符:

>>> 2 in (2, 3, 4)
True

in 运算符可用于检查序列中任何元素的成员资格.

in operator can be used to check for the membership of any element in a sequence.

并且不要将您的元组命名为 tuple.使用不同的名称.

And don't name your tuple as tuple. Use a different name.

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