code: def create_DOM_node_from_dict(d, name, parent_node):
      
      if d is not None:
          root_dict_node = ET.SubElement(parent_node, name)
          for key, value in d.items():
              if value is not None:
                  node = ET.SubElement(root_dict_node, key)
                  node.text = str(value)
          return root_dict_node
docs: Dumps dict data to an ``xml.etree.ElementTree.SubElement`` DOM subtree
      object and attaches it to the specified DOM parent node. The created
      subtree object is named after the specified name. If the supplied dict is
      ``None`` no DOM node is created for it as well as no DOM subnodes are
      generated  for eventual ``None`` values found inside the dict
  
      :param d: the input dictionary
      :type d: dict
      :param name: the name for the DOM subtree to be created
      :type name: str
      :param parent_node: the parent DOM node the newly created subtree must be
          attached to
      :type parent_node: ``xml.etree.ElementTree.Element`` or derivative objects
      :returns: ``xml.etree.ElementTree.SubElementTree`` object