I am asked to do a deep copy of an object if the recursive function does not automatically do so , how can one check?

Question

And is there a way to use deep copy without calling the copy model ?
Here is the function i want check

def weird_list(n):
if n==0:
return []
res= weird_list(n-1)
res.append(weird_list(n-1))
return res

Answer 1

your function is not copying any list. It's just creating a recursively nested list of empty lists...

quick google search result:
https://blog.finxter.com/5-best-ways-to-copy-a-nested-list-in-JUMP_LINK__&&__python__&&__JUMP_LINK/

Answer 2

Bob_Li i have now made sure it actually does a deep copy as it is since each list inside a newly made list is saved at a diffrent location

Answer 3

You can check if your result is a deep copy by altering a deeply nested element of the original nested list and checking if your copy is affected.
It should not change if the original is altered.

Answer 4

Bob_Li makes sense thank you ,I remeber a sentence from the lecture that sometimes recursion does a deep copy automatically , if i remember corectly then when is this the case?

Answer 5

Thank you very much , i will go and read about both 🙏🫡