[halcyon-past]

Project

quarantine-py https://github.com/halcyon-past/quarantine

Checklist

• I read CONTRIBUTING.md - awesome-python is a shortlist, not a catalog
• One project per PR
• PR title format: Add project-name
• Entry format: - [pypi-name](https://github.com/owner/repo) - Description ending with period.
• Display name is the PyPI package name
• Placed in an existing use case (new sections and subcategories are maintainer-only)
• Meets all Quality Requirements: active, stable, documented, at least 1 month old

Which Tier

Pick one:

• Obvious choice - a tool an experienced Python developer would name when asked "what do I use for this?"
• Challenger - not yet the obvious choice, but a credible successor to one. Give adoption-trajectory evidence, not popularity alone.

Explain: quarantine-py is a zero-dependency, typed library that provides dead-letter-queue error isolation and replay for batch ETL pipelines and ingestion loops. Instead of crashing long-running batch jobs on bad items, it serializes failing inputs and full tracebacks to disk (or S3/GCS), with a CLI to debug and replay only failed items without re-running finished work. Active releases (v1.2.0), fully typed, comprehensive test suite (Hypothesis, property tests), and packaged on both PyPI and conda-forge.

Displacement

If the use case is at its cap, name the entry your project replaces and argue that yours does that entry's job better. One in, one out.

Not applicable. Data Ingestion / ETL > General currently has 2 entries (awswrangler, dlt), which is below the 5-entry cap.