Render non-trivial indexes of Pandas Styler object

[mwouts]

Fix #393

[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: .

Also, the version of ITables developed in this PR can be installed with pip:

pip install git+https://github.com/mwouts/itables.git@fix_index_pandas_style

(this requires nodejs, see more at Developing ITables)

[Copilot]

Pull Request Overview

This PR ensures that non-trivial Pandas Styler indexes are rendered in the output, addressing issue #393.

• Added _is_index_trivial helper and refactored showIndex="auto" logic to use it
• Introduced tests for including/excluding trivial and non-trivial indexes in Styler output
• Updated changelog to document the new behavior

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tests/test_javascript.py	Added tests for non-trivial and trivial index rendering logic
src/itables/javascript.py	Introduced _is_index_trivial and updated showIndex handling
docs/changelog.md	Added changelog entry for rendering non-trivial Styler indexes

Comments suppressed due to low confidence (2)

tests/test_javascript.py:182

• [nitpick] The test name suggests trivial indexes are included, but the docstring says they should not be. Consider renaming to test_trivial_index_not_included_in_pd_styler for clarity.

def test_trivial_index_is_included_in_pd_styler(showIndex):

src/itables/javascript.py:349

• [nitpick] The name _is_index_trivial returns true for non-trivial indexes (index name set or non-RangeIndex). Consider renaming it to _is_index_non_trivial or similar to match its behavior.

def _is_index_trivial(df) -> bool:

[Copilot]

Add a docstring explaining what constitutes a 'trivial' vs. 'non-trivial' index so users and maintainers understand the helper's criteria.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.39%. Comparing base (78944b0) to head (2647f15).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #399      +/-   ##
==========================================
+ Coverage   89.27%   89.39%   +0.12%     
==========================================
  Files          44       44              
  Lines        1836     1858      +22     
==========================================
+ Hits         1639     1661      +22     
  Misses        197      197              

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