code: def test_read_sparse6(self):
      data = b":Q___eDcdFcDeFcE`GaJ`IaHbKNbLM"
      G = nx.from_sparse6_bytes(data)
      fh = BytesIO(data)
      Gin = nx.read_sparse6(fh)
      assert nodes_equal(G.nodes(), Gin.nodes())
      assert edges_equal(G.edges(), Gin.edges())
  
imports: from io import BytesIO
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 3 for calling the TestSparseGraph6 obj's underlying member method code with example usage: obj.test_read_sparse6() without return types