code: def create_class_from_xml_string(target_class, xml_string):
      
      if not isinstance(xml_string, six.binary_type):
          xml_string = xml_string.encode('utf-8')
      tree = defusedxml.ElementTree.fromstring(xml_string)
      return create_class_from_element_tree(target_class, tree)
docs: Creates an instance of the target class from a string.
  
      :param target_class: The class which will be instantiated and populated
          with the contents of the XML. This class must have a c_tag and a
          c_namespace class variable.
      :param xml_string: A string which contains valid XML. The root element
          of the XML string should match the tag and namespace of the desired
          class.
  
      :return: An instance of the target class with members assigned according to
          the contents of the XML - or None if the root XML tag and namespace did
          not match those of the target class.