code: def testCallableFilteringFind(self):
      vertex = self.g.vs.find(lambda v: (v.index % 2 == 1))
      self.assertTrue(vertex.index == 1)
      self.assertRaises(
          IndexError, self.g.vs.find, lambda v: (v.index % 2 == 3)
      )
  
imports: import unittest
  from igraph import Graph, Vertex, VertexSeq
  from .utils import is_pypy
label_desc: Use image node_id 9 for calling the VertexSeqTests obj's underlying member method code with example usage: obj.testCallableFilteringFind() without return types