Apply function to specific keys in python list (to for example censor text)

apply_to_key.py

import re
import copy

def apply_to_key(iterable, keys, func):
    iterable = copy.deepcopy(iterable)
    if isinstance(iterable, list):
        for item in iterable:
            iterable = clean(item, keys, func)
    elif isinstance(iterable, dict):
        for key, item in iterable.items():
            if key in keys:
                item = func(item)
            iterable[key] = clean(item, keys, func)
    return iterable