python_playing.py

from functools import singledispatch, wraps
from collections.abc import Iterable

def one_or_many(fn):
    @wraps(fn)
    @singledispatch
    def wrapper(*args, **kwargs):
        fn(*args, **kwargs)
    
    @wrapper.register
    def _(items: Iterable, *args, **kwargs):
        for item in items:
            wrapper(item, *args, **kwargs)

    return wrapper


@one_or_many
def print_fancy(item):
    print(f">>>>>>>>{item}<<<<<<<<")

print_fancy(1)
print_fancy([2, 3, 4])
print_fancy([[[[[[[[[5, 6, 7, 8]]]]]]]]])