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COMPATIBILITY.md

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Compatibility Notes (vs NRCLex 4.0 behavior)

Comparison method

Because external network access is unavailable in this environment, direct installation of NRCLex==4.0 from PyPI was not possible. Instead, behavior was compared against the repository's 4.0 implementation logic using the same bundled lexicon data.

Results

load_token_list

For token list ['happy', 'sad', 'unknown', 'happy'], the updated implementation produced identical values to the 4.0 logic for:

  • raw_emotion_scores
  • affect_frequencies
  • top_emotions

Constructor behavior (NRCLex())

  • 4.0 behavior: default lexicon_file='nrc_en.json' required current working directory assumptions and could fail after installation.
  • Updated behavior: NRCLex() now reliably loads bundled nrclex/data/nrc_en.json via importlib.resources.

This constructor change is intentional and improves install-time reliability without changing the public API.

Metadata corrections (intentional)

  • Removed stdlib entries (collections, json) from dependencies.
  • Set Requires-Python to >=3.9 to align with TextBlob support expectations.