Junk: will delete the branch shortly

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See title

[codecov]

Codecov Report

Attention: Patch coverage is 90.19608% with 5 lines in your changes missing coverage. Please review.

Project coverage is 87.07%. Comparing base (ce858d8) to head (9e18458).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1956      +/-   ##
==========================================
- Coverage   88.13%   87.07%   -1.07%     
==========================================
  Files          83       83              
  Lines       10007     9997      -10     
==========================================
- Hits         8820     8705     -115     
- Misses       1187     1292     +105     

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Now let's start adding changes incrementally.

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Looks like files in .ci/ are not the culprits.

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So one issue discovered. Tests are being made with py3.9 which doesn't support Path.walk(). Causing one failure at this stage.

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It's probably better to work with py3.9 as I do not yet know the full implications of switching the CI/CD test environments to py3.12. I can see a different test now failing when the switch is made to py3.12 in the last commit.

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Changes to the example files causes no test issues.

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That works. Let's try another one.

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mentioning #1949.