rsplit(sep=None, maxsplit = -1)

rsplit is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.

rsplit(sep=None, maxsplit = -1) — output: ['a-b', 'c']. Split from the right, max 1.

Fresher trap: writing s.rsplit() and expecting s to update. Strings are immutable. Write s = s.rsplit(...) if you need the new value (when it returns a string).