code: def parse(self, fn):
          
          ioc_xml = xmlutils.read_xml_no_ns(fn)
          if not ioc_xml:
              return False
          root = ioc_xml.getroot()
          iocid = root.get('id', None)
          if not iocid:
              return False
          self.iocs[iocid] = ioc_xml
          return True
docs: Parses a file into a lxml.etree structure with namespaces remove.  This tree is added to self.iocs.
  
          :param fn: File to parse.
          :return: