Pass list to function by value

Question

I want to pass a list into function by value. By default, lists and other complex objects passed to function by reference. Here is some desision:

def add_at_         


        

Answer 1

In case of ad is list you can simple call your function as add_at_rank(ad + [], rank).

This will create NEW instance of list every time you call function, that value equivalented of ad.

>>>ad == ad + []
True

>>>ad is ad +[]
False

Pure pythonic :)