code: def get_specific_nodes(self, node, names):
          
          nodes = [(x.tagName, x) for x in node.childNodes
                   if x.nodeType == x.ELEMENT_NODE and
                   x.tagName in names]
          return dict(nodes)
docs: Given a node and a sequence of strings in `names`, return a
          dictionary containing the names as keys and child
          `ELEMENT_NODEs`, that have a `tagName` equal to the name.