List non-mutating method

Question

Is there in python any method that instead of mutate the original list it returns a new object?

In JavaScript there is at least one:

const originalArray = [1,2,3]
originalArray.concat(4) // returns a new array

Answer 1

In Python, this will return a new list:

originalArray = [1,2,3]
originalArray + [4]

Or if you want to create a new copy of the list use slices:

originalArray[:]

List comprehensions will also create a new list:

[x for x in originalArray]

This is yet another way:

import copy
copy.copy(originalArray)

And there's also the built-in copy() method, as shown in Ronald's answer.