[py]: fix flake8 violations in trunk

[symonk]

fix flake8 in trunk.

[codecov-commenter]

Codecov Report

Merging #10723 (d1bad51) into trunk (00add35) will not change coverage.
The diff coverage is 33.33%.

@@           Coverage Diff           @@
##            trunk   #10723   +/-   ##
=======================================
  Coverage   46.54%   46.54%           
=======================================
  Files          86       86           
  Lines        5867     5867           
  Branches      278      278           
=======================================
  Hits         2731     2731           
  Misses       2858     2858           
  Partials      278      278           

Impacted Files	Coverage Δ
...lenium/webdriver/common/actions/pointer_actions.py	21.00% <33.33%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 00add35...d1bad51. Read the comment docs.