refactor(python): Correcting misspelled return value and unifying regional spelling

[noexecstack]

A misspelled return value was corrected and the mixture of US and UK spelling (normalize vs. normalise) was unified.

[noexecstack]

Apologies if I misread your documentation but according to the Angular convention, I thought I could use:
style(python): <Title>
I checked what the labeler regex does and it doesn't seem to cover all Angular convention types. I hope refactor covers my PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.10%. Comparing base (db1684d) to head (ffd5d8c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20375      +/-   ##
==========================================
- Coverage   79.10%   79.10%   -0.01%     
==========================================
  Files        1572     1572              
  Lines      219958   219958              
  Branches     2465     2465              
==========================================
- Hits       173991   173989       -2     
- Misses      45399    45401       +2     
  Partials      568      568              

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