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

    def demodify(m):
        s = m.group()
        if (s == '+'):
            return '+-'
        return (('+' + s[1:(-1)].replace(',', '/')) + '-')
    ret = MUTF7_SHIFT_RE.sub(demodify, name)
    try:
        return ret.decode('utf-7').encode('utf-8')
    except (UnicodeDecodeError, UnicodeEncodeError):
        return name

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

def decode_mailbox_name(name):