Python是否有一个不变的列表? [英] Does Python have an immutable list?

问题描述

python有不可变的列表吗?

Does python have immutable lists?

假设我希望具有元素的有序集合的功能，但是我想保证不会改变，那么如何实现呢?列表是有序的，但可以更改.

Suppose I wish to have the functionality of an ordered collection of elements, but which I want to guarantee will not change, how can this be implemented? Lists are ordered but they can be mutated.

推荐答案

是.它称为tuple.

因此，(1,2)不是list且可以突变的[1,2]，而不是tuple并且不能.

So, instead of [1,2] which is a list and which can be mutated, (1,2) is a tuple and cannot.

其他信息:

一个元素tuple不能通过编写(1)实例化，相反，您需要编写(1,).这是因为解释器在括号中还有其他用途.

A one-element tuple cannot be instantiated by writing (1), instead, you need to write (1,). This is because the interpreter has various other uses for parentheses.

您也可以完全取消括号:1,2与(1,2)

You can also do away with parentheses altogether: 1,2 is the same as (1,2)

请注意，元组不是完全不可变的列表.点击此处，详细了解列表与元组之间的差异

Note that a tuple is not exactly an immutable list. Click here to read more about the differences between lists and tuples

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