♻️ small improvements

[Sigmanificient]

• optimized import
• removed useless code
• pep8

[codecov]

Codecov Report

Merging #347 (e1d12d0) into main (94096bc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #347   +/-   ##
=======================================
  Coverage   90.54%   90.54%           
=======================================
  Files           8        8           
  Lines          74       74           
=======================================
  Hits           67       67           
  Misses          7        7           

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