human
I wrote the below code

    def sortkey(x):
        return [(int(c) if c.isdigit() else c) for c in re.split(numbers, x)]
    numbers = re.compile('(\\d+)')
    return sorted(iterable, key=sortkey)

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def natural_sorted(iterable):