code: def testEmptySequence(self):
      empty_es = self.g.es.select(None)
      self.assertTrue(len(empty_es) == 0)
      self.assertRaises(IndexError, empty_es.__getitem__, 0)
      self.assertRaises(KeyError, empty_es.__getitem__, "nonexistent")
      self.assertTrue(empty_es["test"] == [])
      empty_es = self.g.es[[]]
      self.assertTrue(len(empty_es) == 0)
      empty_es = self.g.es[()]
      self.assertTrue(len(empty_es) == 0)
  
imports: import unittest
  from igraph import Graph, Edge, EdgeSeq, VertexSeq
  from .utils import is_pypy
label_desc: Use image node_id 9 for calling the EdgeSeqTests obj's underlying member method code with example usage: obj.testEmptySequence() without return types