Few doc updates for licensing year. Remove var assignment for error t…

…hhat wasn't being used.

examples/04-get-update-instantiate/backends.py

@@ -1,6 +1,6 @@
-"""Example of a DiffSync adapter implementation.
+"""Example of a DiffSync adapter implementation using new helper methods.
 
-Copyright (c) 2020 Network To Code, LLC <[email protected]>
+Copyright (c) 2021 Network To Code, LLC <[email protected]>
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -86,8 +86,6 @@ class BackendA(DiffSync):
 
     type = "Backend A"
 
-    nb = None
-
     def load(self):
         """Initialize the BackendA Object by loading some site, device and interfaces from DATA."""
         for device_data in BACKEND_DATA_A:
@@ -118,8 +116,6 @@ class BackendB(DiffSync):
 
     type = "Backend B"
 
-    nb = None
-
     def load(self):
         """Initialize the BackendB Object by loading some site, device and interfaces from DATA."""
         for device_data in BACKEND_DATA_B:

examples/04-get-update-instantiate/main.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-"""Main executable for DiffSync "example1".
+"""Main executable for DiffSync "04-get-update-instantiate".
 
 Copyright (c) 2021 Network To Code, LLC <[email protected]>
 

examples/04-get-update-instantiate/models.py

@@ -1,6 +1,6 @@
 """Example models.
 
-Copyright (c) 2020 Network To Code, LLC <[email protected]>
+Copyright (c) 2021 Network To Code, LLC <[email protected]>
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

tests/unit/test_diffsync_model.py

@@ -136,7 +136,7 @@ def test_diffsync_model_subclass_add_remove(make_site, make_device, make_interfa
     assert site1.devices == []
     with pytest.raises(ObjectStoreWrongType):
         site1.remove_child(device1_eth0)
-    with pytest.raises(ObjectNotFound) as error:
+    with pytest.raises(ObjectNotFound):
         site1.remove_child(device1)
 
     assert device1.interfaces == []