Code style improvements (#4683)

* fix list comps

* mopre comp fixes

* reduce computing cost on any() calls

* add bugbear

* check for clean imports

* only allow limited relative imports

* fix notification method lookup

* fix notification method assigement

* rewrite assigment

* fix upstream changes to new style

* fix upstream change to new coding style

.pre-commit-config.yaml

@@ -18,9 +18,12 @@ repos:
     hooks:
     -   id: flake8
         additional_dependencies: [
+                'flake8-bugbear',
+                'flake8-comprehensions',
                 'flake8-docstrings',
                 'flake8-string-format',
-                'pep8-naming ',
+                'flake8-tidy-imports',
+                'pep8-naming'
         ]
 -   repo: https://github.com/pycqa/isort
     rev: '5.12.0'