code: def _xml_convert(self, element):
          
  
          children = list(element)
  
          if len(children) == 0:
              return self._type_convert(element.text)
          else:
              # if the fist child tag is list-item means all children are list-item
              if children[0].tag == "list-item":
                  data = []
                  for child in children:
                      data.append(self._xml_convert(child))
              else:
                  data = {}
                  for child in children:
                      data[child.tag] = self._xml_convert(child)
  
              return data
docs: convert the xml `element` into the corresponding python object