pip-requirements-parser
pip requirements parser - a mostly correct pip requirements parsing library because it uses pip's own code.
Decision gist · record as of 2026-08-14
Yes, if your requirements file syntax is stable and you need offline, pip-compatible parsing without pip's dependencies. The library is production-stable and has comprehensive test coverage. However, do not install if you require support for pip syntax changes after December 2022 or expect ongoing maintenance—the project is dormant and will not track pip's evolution.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.6 or later; designed to work offline but will not receive updates if pip's requirements syntax evolves.
- Low friction: pure Python wheel with only two runtime dependencies (packaging and pyparsing).
- Maintenance is dormant—last release was 2022-12-21 and no commits since 2024-09-02—so expect no updates for new pip syntax or Python versions, though the codebase is marked Production/Stable.
License · maintenance · safety
MIT (permissive) — MIT license is permissive and imposes no restrictions on use, modification, or distribution in commercial or private projects.
last release 2022-12-21 (1332 days) · last repo commit 2024-09-02 · 20 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 31,716,922 downloads/mo, #783 on PyPI
Alternatives
Verify before relying
from pip_requirements_parser import RequirementsFile
rf = RequirementsFile.from_file("requirements.txt")
for req in rf.requirements:
print(req.to_dict())- Whether the library continues to parse correctly as pip's syntax evolves post-2024-09-02.
- Compatibility with pip versions released after the library's last update in December 2022.
What it is and what it does
pip-requirements-parser extracts pip's own requirements-file parsing logic into a standalone Python library. Rather than reimplementing the parser from scratch or wrapping pip as a library (both approaches that risk incompleteness or dependency on pip's unstable internals), this package forks and maintains the relevant subset of pip's code. It parses requirements files offline without making network calls, and exposes a simple, stable API that returns structured objects for requirements, options, comments, and invalid lines.
The library is designed for tools that need to understand pip requirements files without depending on pip itself or reimplementing its parsing. It includes pip's own test suite plus additional test coverage from other requirement parsers, making it one of the most comprehensive parsers available. However, maintenance is dormant: the last release was in December 2022, so it will not automatically track changes to pip's syntax or support for new Python versions.
Use it for
- Analyze and validate requirements files in build or CI/CD pipelines without invoking pip.
- Extract structured dependency information from requirements files for reporting or auditing tools.
- Parse requirements in offline or constrained environments where network access is unavailable.
- Migrate or transform requirements files programmatically while preserving comments and options.
- Integrate requirements parsing into package managers or dependency resolution tools that need pip-compatible parsing.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if your requirements file syntax is stable and you need offline, pip-compatible parsing without pip's dependencies.
The library is production-stable and has comprehensive test coverage. However, do not install if you require support for pip syntax changes after December 2022 or expect ongoing maintenance—the project is dormant and will not track pip's evolution.
Install
pip-requirements-parser on PyPI
Before you install
Low friction: pure Python wheel with only two runtime dependencies (packaging and pyparsing). Maintenance is dormant—last release was 2022-12-21 and no commits since 2024-09-02—so expect no updates for new pip syntax or Python versions, though the codebase is marked Production/Stable.
Requires Python 3.6 or later; designed to work offline but will not receive updates if pip's requirements syntax evolves.
License in practice
MIT license is permissive and imposes no restrictions on use, modification, or distribution in commercial or private projects.
Quickstart
from pip_requirements_parser import RequirementsFile
rf = RequirementsFile.from_file("requirements.txt")
for req in rf.requirements:
print(req.to_dict())Verify before relying
- Whether the library continues to parse correctly as pip's syntax evolves post-2024-09-02.
- Compatibility with pip versions released after the library's last update in December 2022.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.6.0 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagespackagingpyparsing |
| Maintenance | Dormant 1,332 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 31,716,922 / month, #783 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/StableIntended Audience :: DevelopersProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyTopic :: Software DevelopmentTopic :: Utilities |
Evidence: pip_requirements_parser-32.0.1-py3-none-any.whl
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See also dparse2 · requirements-parser · requirementslib · dparse · pip-api · pip-tools · pipfile · requirements-detector · debian-inspector · pip-compile-multi