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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_close_args(self, data):
 """ this functions extracts the code, reason from the close body if they exists, and if the self.on_close except three arguments """

        # if the on_close callback is "old", just return empty list
        if sys.version_info < (3, 0):
            if not self.on_close or len(inspect.getargspec(self.on_close).args) != 3:
                return []
        else:
            if 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]