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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 parse_xml_node(self, node):
        '''Parse an xml.dom Node object representing a component group into
        this object.

        '''
        self.group_id = node.getAttributeNS(RTS_NS, 'groupId')
        self._members = []
        for c in node.getElementsByTagNameNS(RTS_NS, 'Members'):
            self._members.append(TargetComponent().parse_xml_node(c))
        return self