human
Here's a good function header given the following:
I wrote the below code

    if isinstance(label, str):
        labels = [label]
    else:
        labels = label
    tmp = (lambda : None)
    for label in labels:
        setattr(tmp, label, True)
    def decor(f):
        for label in labels:
            setattr(f, label, True)
        return f
    if (ds is None):
        ds = ('Labels    a    test    as    %r' % label)
        decor.__doc__ = ds
    return decor

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

def make_label_dec(label, ds=None):