logstats summarises log files by severity level. It is a two-module tool: logstats/parser.py does the counting, logstats/cli.py is the command-line front end.

Log lines look like this (see sample.log):

2024-03-01 09:00:00 INFO service started
2024-03-01 09:00:04 ERROR payment gateway timeout

Usage:

python -m logstats.cli sample.log            # counts per level
python -m logstats.cli a.log b.log --top 2   # aggregate files, top 2 levels

Your task

The tool has bugs. The test suite describes the intended behaviour and currently fails. Debug the tool until the suite passes:

pip install -e ".[dev]"
python -m pytest

Fix the causes, not the symptoms — we read the diff, not just the test output. Note anything interesting in the repository-level NOTES.md.