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

    f = ParserElement._normalizeParseActionArgs(f)
    def z(*paArgs):
        thisFunc = f.func_name
        (s, l, t) = paArgs[(-3):]
        if (len(paArgs) > 3):
            thisFunc = ((paArgs[0].__class__.__name__ + '.') + thisFunc)
        sys.stderr.write((">>entering    %s(line:    '%s',    %d,    %s)\n" % (thisFunc, line(l, s), l, t)))
        try:
            ret = f(*paArgs)
        except Exception as exc:
            sys.stderr.write(('<<leaving    %s    (exception:    %s)\n' % (thisFunc, exc)))
            raise
        sys.stderr.write(('<<leaving    %s    (ret:    %s)\n' % (thisFunc, ret)))
        return ret
    try:
        z.__name__ = f.__name__
    except AttributeError:
        pass
    return z

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

def traceParseAction(f):