glance Style Commandments

Step 1: Read the OpenStack Style Commandments https://docs.openstack.org/developer/hacking/
Step 2: Read on

glance Specific Commandments

[G316] Change assertTrue(isinstance(A, B)) by optimal assert like assertIsInstance(A, B)
[G317] Change assertEqual(type(A), B) by optimal assert like assertIsInstance(A, B)
[G318] Change assertEqual(A, None) or assertEqual(None, A) by optimal assert like assertIsNone(A)
[G319] Validate that debug level logs are not translated
[G327] Prevent use of deprecated contextlib.nested
[G328] Must use a dict comprehension instead of a dict constructor with a sequence of key-value pairs
[G330] Log.warn is deprecated. Enforce use of LOG.warning.