Address ruff linter remarks

[aobolensk]

Pre-requisite for #538

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.78%. Comparing base (3ed7b92) to head (0117a94).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #537   +/-   ##
=======================================
  Coverage   94.78%   94.78%           
=======================================
  Files          11       11           
  Lines         364      364           
  Branches      124      124           
=======================================
  Hits          345      345           
  Misses          5        5           
  Partials       14       14           

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