extension-helpers
Utilities for building and installing packages with compiled extensions
Decision gist · record as of 2026-08-14
Yes, if you are building a Python package with C or Cython extensions and want to reduce build configuration complexity. The low install friction, active maintenance, permissive license, and lack of known vulnerabilities make it a safe dependency. Skip it if your project uses a different build system or has no compiled extensions.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; a C compiler and development headers are typically needed to build extensions at install time.
- Low friction installation with only setuptools and tomli as runtime dependencies.
- Active maintenance with recent commits and stable production status.
License · maintenance · safety
BSD 3-Clause License (permissive) — BSD 3-Clause License is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
last release 2025-06-09 (431 days) · last repo commit 2026-08-13 · 17 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,685,829 downloads/mo, #3,653 on PyPI
Alternatives
Verify before relying
pip install extension-helpers
In setup.py or pyproject.toml, use extension-helpers as a build backend or build requirement alongside setuptools to configure C/Cython extension compilation.- Whether this package is necessary for your build or if setuptools alone suffices for your extension use case
- Specific Cython or C compilation toolchain requirements beyond what the fact sheet documents
What it is and what it does
extension-helpers is a setuptools plugin that streamlines the build configuration for Python packages containing compiled C or Cython extensions. Developed by the Astropy project, it abstracts away common boilerplate and configuration patterns that would otherwise require manual setup.py or pyproject.toml tuning. The package depends on setuptools and tomli for parsing configuration files.
It is intended as a general-purpose tool for any Python package author building extensions, not just Astropy-specific projects. The package is actively maintained, in production-stable status, and carries no known security vulnerabilities. Installation is straightforward with low dependency friction.
Use it for
- Simplify build configuration when packaging a Python library that wraps C code or uses Cython modules
- Reduce boilerplate in setup.py or pyproject.toml for projects with multiple compiled extensions
- Ensure consistent extension build behavior across different development and CI environments
- Integrate extension building into a setuptools-based workflow without manual compiler flag management
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are building a Python package with C or Cython extensions and want to reduce build configuration complexity.
The low install friction, active maintenance, permissive license, and lack of known vulnerabilities make it a safe dependency. Skip it if your project uses a different build system or has no compiled extensions.
Install
extension-helpers on PyPI
Before you install
Low friction installation with only setuptools and tomli as runtime dependencies. Active maintenance with recent commits and stable production status.
Requires Python 3.10 or later; a C compiler and development headers are typically needed to build extensions at install time.
License in practice
BSD 3-Clause License is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
Quickstart
pip install extension-helpers
In setup.py or pyproject.toml, use extension-helpers as a build backend or build requirement alongside setuptools to configure C/Cython extension compilation.Verify before relying
- Whether this package is necessary for your build or if setuptools alone suffices for your extension use case
- Specific Cython or C compilation toolchain requirements beyond what the fact sheet documents
Package facts
| License | BSD 3-Clause License permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagessetuptoolstomli |
| Maintenance | Actively maintained 431 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 1,685,829 / month, #3,653 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableFramework :: Setuptools PluginIntended Audience :: DevelopersLicense :: OSI Approved :: BSD LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Topic :: Software Development :: Build ToolsTopic :: Software Development :: Libraries :: Python ModulesTopic :: System :: Archiving :: Packaging |
Evidence: extension_helpers-1.4.0-py3-none-any.whl
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