---
title: "particle Breaking Changes on PyPI | Since.dev"
description: "What each particle release removed, renamed or changed: 1,298 breaking changes in 1 version on PyPI, each with its source."
canonical_url: https://since.dev/packages/pypi/particle
last_updated: 2026-06-25
---

# particle breaking changes

Every breaking API change we have recorded in particle on PyPI: 1,298 breaking changes in 1 version. Below are its newest version, removals and renames first, each with its source.

Newest change June 25, 2026

## 1.0.0

1,298 breaking changes, first published June 25, 2026.

- **Removed**  

The 2020 and 2022 nucleus data files are no longer shipped. Code that loads them must use the 2026 nucleus data file. [github.com](https://github.com/scikit-hep/particle/releases/tag/v1.0.0)
- **Removed**  

The superseded 2022 and 2023 PDG and derived data files are no longer shipped. Code that loads those data files must switch to a newer version. [github.com](https://github.com/scikit-hep/particle/releases/tag/v1.0.0)
- **Removed**  

The package no longer supports Python 3.9. Users on Python 3.9 must stay on an earlier release or upgrade Python. [github.com](https://github.com/scikit-hep/particle/releases/tag/v1.0.0)
- **Removed** `particle.converters.corsika.BiMap`  

particle.converters.corsika.BiMap was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.converters.geant.BiMap`  

particle.converters.geant.BiMap was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.converters.pythia.BiMap`  

particle.converters.pythia.BiMap was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.corsika.corsika7id.data`  

particle.corsika.corsika7id.data was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.geant.geant3id.data`  

particle.geant.geant3id.data was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.geant.geant3id.MatchingIDNotFound`  

particle.geant.geant3id.MatchingIDNotFound was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)
- **Removed** `particle.particle.literals.a_0_1450_0`  

particle.particle.literals.a_0_1450_0 was removed in particle 1.0.0 [pypi.org](https://pypi.org/project/particle/1.0.0/)

And 1,288 more in this version.

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