fixup! Add PipelineGraph package.

tests/test_pipeline_graph.py

@@ -105,7 +105,8 @@ def setUp(self) -> None:
 
     def test_unresolved_accessors(self) -> None:
         """Test attribute accessors, iteration, and simple methods on a graph
-        that has not had `PipelineGraph.resolve` called on it."""
+        that has not had `PipelineGraph.resolve` called on it.
+        """
         self.check_base_accessors(self.graph)
         self.assertEqual(
             repr(self.graph.tasks["a"]), "a (lsst.pipe.base.tests.mocks.DynamicTestPipelineTask)"
@@ -120,7 +121,8 @@ def test_sorting(self) -> None:
 
     def test_unresolved_xgraph_export(self) -> None:
         """Test exporting an unresolved PipelineGraph to networkx in various
-        ways."""
+        ways.
+        """
         self.check_make_xgraph(self.graph, resolved=False)
         self.check_make_bipartite_xgraph(self.graph, resolved=False)
         self.check_make_task_xgraph(self.graph, resolved=False)
@@ -182,7 +184,8 @@ def test_resolved_accessors(self) -> None:
 
     def test_resolved_xgraph_export(self) -> None:
         """Test exporting a resolved PipelineGraph to networkx in various
-        ways."""
+        ways.
+        """
         self.graph.resolve(MockRegistry(self.dimensions, {}))
         self.check_make_xgraph(self.graph, resolved=True)
         self.check_make_bipartite_xgraph(self.graph, resolved=True)
@@ -249,8 +252,8 @@ def test_resolved_copies(self) -> None:
         self.check_make_xgraph(copy3, resolved=True)
 
     def check_base_accessors(self, graph: PipelineGraph) -> None:
-        """Implementation for test methods that check attribute access,
-        iteration, and simple methods.
+        """Run parameterized tests that check attribute access, iteration, and
+        simple methods.
 
         The given graph must be unchanged from the one defined in `setUp`,
         other than sorting.