semver
Python helper for Semantic Versioning (https://semver.org)
Decision gist · record as of 2026-08-14
Yes. semver is a stable, well-maintained library with zero dependencies, permissive licensing, and no known vulnerabilities. It solves a real problem—semantic version parsing and manipulation—cleanly and efficiently. Install it if you need to work with version strings programmatically.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.7 or later.
- Low friction installation with no runtime dependencies.
- Active maintenance with a recent commit on 2026-08-05 and steady development history since 2012-05-09.
License · maintenance · safety
permissive license (permissive) — BSD License (permissive). You can use, modify, and distribute this package freely in commercial and private projects, provided you retain the copyright notice and disclaimer.
last release 2025-01-24 (567 days) · last repo commit 2026-08-05 · 520 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 91,007,414 downloads/mo, #371 on PyPI
Alternatives
Verify before relying
pip install semver
import semver
ver = semver.Version.parse('1.2.3-pre.2+build.4')
print(ver.major, ver.minor, ver.patch)
print(semver.compare('1.0.0', '2.0.0'))What it is and what it does
semver is a lightweight Python library for working with semantic versioning as defined by the semver.org specification. It provides utilities to parse version strings into their component parts (major, minor, patch, prerelease, build), compare versions, and programmatically bump version numbers. The library handles the full semver syntax including pre-release labels and build metadata.
The package is designed for developers who need to manage version strings in their applications—whether for dependency resolution, release management, or version-aware logic. It eliminates the need to write custom regex or string parsing for semantic versions and provides a clean API for version comparisons and increments.
Use it for
- Parse version strings from package metadata or configuration files to extract and validate version components.
- Compare two version strings to determine which is newer, for dependency resolution or compatibility checks.
- Automatically bump major, minor, or patch version numbers during release workflows.
- Validate that a version string conforms to semantic versioning before storing or publishing it.
- Chain version bumps (e.g., bump_major().bump_minor()) to compute new versions in release pipelines.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
semver is a stable, well-maintained library with zero dependencies, permissive licensing, and no known vulnerabilities. It solves a real problem—semantic version parsing and manipulation—cleanly and efficiently. Install it if you need to work with version strings programmatically.
Install
semver on PyPI
Before you install
Low friction installation with no runtime dependencies. Active maintenance with a recent commit on 2026-08-05 and steady development history since 2012-05-09.
Requires Python 3.7 or later.
License in practice
BSD License (permissive). You can use, modify, and distribute this package freely in commercial and private projects, provided you retain the copyright notice and disclaimer.
Quickstart
pip install semver
import semver
ver = semver.Version.parse('1.2.3-pre.2+build.4')
print(ver.major, ver.minor, ver.patch)
print(semver.compare('1.0.0', '2.0.0'))Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.7 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 567 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 91,007,414 / month, #371 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/StableEnvironment :: Web EnvironmentIntended Audience :: DevelopersLicense :: OSI Approved :: BSD LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Software Development :: Libraries :: Python Modules |
Evidence: semver-3.0.4-py3-none-any.whl
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See also node-semver · semantic-version · semver4 · version-parser · release-tag · versions · bumpver · python-semantic-release · autosemver · keepachangelog