Return then the number of positional parameters and
        represented by the attr field of token

def get_pos_kw(self, token):
        """Return then the number of positional parameters and
        represented by the attr field of token"""
        # Low byte indicates number of positional paramters,
        # high byte number of keyword parameters
        args_pos = token.attr & 0xff
        args_kw = (token.attr >> 8) & 0xff
        return args_pos, args_kw