test(python): Added test to check for the computation of list.len for null

[skritsotalakis]

closes #18522

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.30%. Comparing base (2eb0109) to head (6afa4ca).
Report is 58 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20938      +/-   ##
==========================================
- Coverage   79.77%   79.30%   -0.47%     
==========================================
  Files        1569     1578       +9     
  Lines      222898   224135    +1237     
  Branches     2574     2574              
==========================================
- Hits       177807   177746      -61     
- Misses      44500    45798    +1298     
  Partials      591      591              

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[mcrumiller]

FYI not sure if you meant to close two separate issues, but you linked to the same issue twice in your description.

[skritsotalakis]

FYI not sure if you meant to close two separate issues, but you linked to the same issue twice in your description.

thanks! I changed it