Python: Map a function over recursive iterables

Question

I have an arbitrarily nested iterable like so:

numbers = (1, 2, (3, (4, 5)), 7)

and I\'d like to map a function over it without changing the st

Answer 1

If you want to extend your result to dict, set and others, you can use Uriel's answer:

from collections import Collection, Mapping

def recursive_map(data, func):
    apply = lambda x: recursive_map(x, func)
    if isinstance(data, Mapping):
        return type(data)({k: apply(v) for k, v in data.items()})
    elif isinstance(data, Collection):
        return type(data)(apply(v) for v in data)
    else:
        return func(data)

Tests input:

recursive_map({0: [1, {2, 2, 3}]}, str)

Yields:

{0: ['1', '{2, 3}']}