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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_intf_rb_id(rbridge_id):
 """ Creates a new Netconf request based on the rbridge_id specifed """


        intf_rb_id = ET.Element(
            'get-ip-interface',
            xmlns="urn:brocade.com:mgmt:brocade-interface-ext"
        )
        if rbridge_id is not None:
            rbridge_el = ET.SubElement(intf_rb_id, "rbridge-id")
            rbridge_el.text = rbridge_id

        return intf_rb_id