'this functions extracts the code, reason from the close body
if they exists, and if the self.on_close except three arguments'

def _get_close_args(self, data):

    import inspect
    if (sys.version_info < (3, 0)):
        if ((not self.on_close) or (len(inspect.getargspec(self.on_close).args) != 3)):
            return []
    elif ((not self.on_close) or (len(inspect.getfullargspec(self.on_close).args) != 3)):
        return []
    if (data and (len(data) >= 2)):
        code = ((256 * six.byte2int(data[0:1])) + six.byte2int(data[1:2]))
        reason = data[2:].decode('utf-8')
        return [code, reason]
    return [None, None]
