code: def add_spells(self, data, node_or_edge_xml):
      spells_element = node_or_edge_xml.find(
          f"{{{self.NS_GEXF}}}spells"
      )
      if spells_element is not None:
          data["spells"] = []
          ttype = self.timeformat
          for s in spells_element.findall(f"{{{self.NS_GEXF}}}spell"):
              start = self.python_type[ttype](s.get("start"))
              end = self.python_type[ttype](s.get("end"))
              data["spells"].append((start, end))
      return data
  
imports: import itertools
  import time
  from xml.etree.ElementTree import Element, ElementTree, SubElement, register_namespace, tostring
  import networkx
  from networkx.utils import open_file
label_desc: Use image node_id 9 for calling the GEXFReader obj's underlying member method code with example usage: obj.add_spells(data, node_or_edge_xml) and returns: data