pip-requirements-parser

pip requirements parser - a mostly correct pip requirements parsing library because it uses pip's own code.

pip-requirements-parser Permissive license MIT DORMANT ★ 20 v32.0.1 released 2022-12-21

Install

pip-requirements-parser on PyPI

pip

pip install pip-requirements-parser

uv

uv add pip-requirements-parser

poetry

poetry add pip-requirements-parser

Package facts

License	MIT (permissive)
Python support	supports the current Python release (>=3.6.0)
Install friction	low — pure-Python wheel
Runtime dependencies	2 — packaging, pyparsing
Maintenance	dormant — 1,331 days since the last release
Last repo commit	2024-09-02
First released	2022-01-27
Popularity	one of the top 1,000 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: pip_requirements_parser-32.0.1-py3-none-any.whl

Keywords: utilities, pip, requirements, parser, dependencies, pypi

Development Status :: 5 - Production/StableIntended Audience :: DevelopersProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyTopic :: Software DevelopmentTopic :: Utilities

About pip-requirements-parser

from the package's own PyPI description — quoted content, verbatim

pip-requirements-parser - a mostly correct pip requirements parsing library

Copyright (c) nexB Inc. and others. Copyright (c) The pip developers (see AUTHORS.rst file) SPDX-License-Identifier: MIT Homepage: https://github.com/nexB/pip-requirements and https://www.aboutcode.org/

pip-requirements-parser is a mostly correct pip requirements parsing library ... because it uses pip's own code!

pip is the package installer for Python that is using "requirements" text files listing the packages to install.

Per https://pip.pypa.io/en/stable/reference/requirements-file-format/ :

"The requirements file format is closely tied to a number of internal
details of pip (e.g., pip’s command line options). The basic format is
relatively stable and portable but the full syntax, as described here,
is only intended for consumption by pip, and other tools should take
that into account before using it for their own purposes."

And per https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program :

"[..] pip is a command line program. While it is implemented in Python, and...

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AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

Parses pip requirements files using pip's own internal code, handling all syntax variations that pip supports without requiring network access or pip as a dependency.

Low friction: only two runtime dependencies (packaging and pyparsing), pure Python wheel. However, maintenance is dormant—last release was December 2022, over three years ago, with no recent commits despite the repository remaining active.

MIT license permits unrestricted use, modification, and distribution with minimal obligations—suitable for both open-source and proprietary projects.

Usage

pip install pip-requirements-parser
from pip_requirements_parser import RequirementsFile
rf = RequirementsFile.from_file('requirements.txt')
for req in rf.requirements:
    print(req.to_dict())

Requires Python 3.6 or later.

Verdict: Solid for parsing requirements files offline with minimal dependencies, backed by pip's own code and an extensive test suite. The permissive MIT license poses no barrier. However, dormant maintenance (last release December 2022) means no updates for pip's evolving syntax or security fixes—use only if your requirements format is stable or if you can maintain it yourself.

Needs verification

Whether the parser remains compatible with current pip requirements syntax (pip has evolved since December 2022)
Whether any of the two runtime dependencies (packaging, pyparsing) have introduced breaking changes since the last release

pip requirements file parserparse requirements.txtpip dependency parsingrequirements file syntaxoffline requirements parsingpip requirements formatparse pip dependencies