# Part 2 — logstats: debug a small CLI

`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:

```bash
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:

```bash
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`.