从一个字符串和一个字符串列表创建一个元组 [英] Create a tuple from a string and a list of strings

问题描述

我需要将一个字符串和一个字符串列表组合成一个元组，以便可以将其用作字典键.这将是一个内循环，因此速度很重要.

I need to combine a string along with a list of strings into a tuple so I can use it as a dictionary key. This is going to be in an inner loop so speed is important.

列表很小(通常为1，但有时为2或3个项目).

The list will be small (usually 1, but occasionally 2 or 3 items).

最快的方法是什么?

之前:

my_string == "foo"
my_list == ["bar", "baz", "qux", "etc"]

之后:

my_tuple == ("foo", "bar", "baz", "qux", "etc")

(注意:my_list本身不能更改).

(Note: my_list must not be altered itself).

推荐答案

我不能说性能，但这绝对是我能想到的最简单的方法:

I can't speak for performance, but this is definitely the simplest I can think of:

my_tuple = tuple([my_string] + my_list)

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