old_contents: import pickle
  from pprint import pformat
  from rdflib import logger
  from rdflib.graph import Dataset
  from rdflib.namespace import Namespace
  from rdflib.compare import to_isomorphic
  
  
  def test_issue893_ds_unpickle():
      example = Namespace("http://example.com#")
  
      ds1 = Dataset()
      one = ds1.graph(example.one)
  
      one.add((example.dan, example.knows, example.lisa))
      one.add((example.lisa, example.knows, example.dan))
  
      two = ds1.graph(example.two)
  
      two.add((example.ben, example.knows, example.lisa))
      two.add((example.lisa, example.knows, example.ben))
  
      assert set(ds1.quads((None, None, None, None))) == set(
          ds1.quads((None, None, None, None))
      )
  
      picklestring = pickle.dumps(ds1)
      ds2 = pickle.loads(picklestring)
  
      ds1graphs = list(ds1.graphs())
      ds2graphs = list(ds2.graphs())
  
      for new_graph, graph in zip(ds2graphs, ds1graphs):
          assert new_graph.identifier == graph.identifier
          for new_triple, triple in zip(
              new_graph.triples((None, None, None)), graph.triples((None, None, None))
          ):
              assert new_triple in graph.triples((None, None, None))
              assert triple in new_graph.triples((None, None, None))
  
new_contents: import pickle
  from rdflib.graph import Dataset
  from rdflib.namespace import Namespace
  
  
  def test_issue893_ds_unpickle():
      example = Namespace("http://example.com#")
  
      ds1 = Dataset()
      one = ds1.graph(example.one)
  
      one.add((example.dan, example.knows, example.lisa))
      one.add((example.lisa, example.knows, example.dan))
  
      two = ds1.graph(example.two)
  
      two.add((example.ben, example.knows, example.lisa))
      two.add((example.lisa, example.knows, example.ben))
  
      assert set(ds1.quads((None, None, None, None))) == set(
          ds1.quads((None, None, None, None))
      )
  
      picklestring = pickle.dumps(ds1)
      ds2 = pickle.loads(picklestring)
  
      ds1graphs = list(ds1.graphs())
      ds2graphs = list(ds2.graphs())
  
      for new_graph, graph in zip(ds2graphs, ds1graphs):
          assert new_graph.identifier == graph.identifier
          for new_triple, triple in zip(
              new_graph.triples((None, None, None)), graph.triples((None, None, None))
          ):
              assert new_triple in graph.triples((None, None, None))
              assert triple in new_graph.triples((None, None, None))
  
subject: remove tmp cruft