Add function to read TEfficiency

[longjon929]

Adds a function to read in TEfficiency by creating a TGraph and feeding that into the existing TGraph reader.

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📚 Documentation preview 📚: https://hepdata-lib--275.org.readthedocs.build/en/275/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.54%. Comparing base (62a82d5) to head (c814f20).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #275      +/-   ##
==========================================
+ Coverage   90.51%   90.54%   +0.03%     
==========================================
  Files           5        5              
  Lines        1117     1121       +4     
  Branches      237      230       -7     
==========================================
+ Hits         1011     1015       +4     
  Misses         78       78              
  Partials       28       28              

Flag	Coverage Δ
unittests-3.10	90.54% <100.00%> (+0.03%)	⬆️
unittests-3.11	90.54% <100.00%> (+0.03%)	⬆️
unittests-3.6	?
unittests-3.7	90.18% <100.00%> (+0.03%)	⬆️
unittests-3.8	90.27% <100.00%> (+0.03%)	⬆️
unittests-3.9	90.36% <100.00%> (+0.03%)	⬆️

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[clelange]

Hi @longjon929 -- thanks for your contribution! It would be great if you added some small tests to make sure the code works as expected and we will not break it in the future when making further changes. Do you think you could add some? Have a look at how we test other parts of the code and let me know if you need help.

[longjon929]

@clelange I will try to take a look when I get a chance.

[GraemeWatt]

Looks like pylint has an issue with this line:
tests/test_rootfilereader.py:186:15: E1101: Module 'ROOT' has no 'TEfficiency' member (no-member)
I encountered this issue when upgrading the pylint version in PR #260. The workaround was to add # pylint: disable=no-member to the end of the affected lines (see commit 3a0f1ea).

By the way, the developer docs advise that pylint should be run locally before pushing to GitHub to check for any issues. You might also want to consider extending the section of the docs on Reading from ROOT files (source in docs/usage.rst) to mention the new functionality. Thanks for your contribution!