code: def test_read_edgelist_1(self):
      s = b"""\
  # comment line
  1 2
  # comment line
  2 3
  """
      bytesIO = io.BytesIO(s)
      G = bipartite.read_edgelist(bytesIO, nodetype=int)
      assert edges_equal(G.edges(), [(1, 2), (2, 3)])
  
imports: import io
  import pytest
  import networkx
  from networkx.algorithms import bipartite
  from networkx.utils import edges_equal, graphs_equal, nodes_equal
label_desc: Use image node_id 2 for calling the TestEdgelist obj's underlying member method code with example usage: obj.test_read_edgelist_1() without return types