code: def test_node_attribute_xy_undirected_nodes(self):
      attrxy = sorted(
          nx.node_attribute_xy(self.G, "fish", nodes=["one", "yellow"])
      )
      attrxy_result = sorted([])
      assert attrxy == attrxy_result
  
file_path: networkx/networkx/algorithms/assortativity/tests/test_pairs.py
imports: import networkx
  from .base_test import BaseTestAttributeMixing, BaseTestDegreeMixing
label_desc: Use image node_id 2 for calling the TestAttributeMixingXY obj's underlying member method code with example usage: obj.test_node_attribute_xy_undirected_nodes() without return types