pythonOtherHard

Copying a grid still shares its rows

Time: 0:00

What it should do

The function copies a grid, edits the copy, then reports the ORIGINAL's first cell — which should be unchanged. For [[1,2],[3,4]] it returns 1.

What goes wrong

original_after_edit([[1,2],[3,4]]) returns 99 — editing the copy changed the original too.

Hints

This is a mutation and copying bugs bug

Assignment does not copy, a shallow copy still shares its contents, and mutating methods return None.