stdlib-list
A list of Python Standard Libraries (2.7 through 3.14).
Decision gist · record as of 2026-08-14
Yes, if you support Python versions older than 3.10 and need to programmatically check stdlib membership. No, if you target only Python 3.10 or newer — use sys.stdlib_module_names instead. The package is well-maintained, has no security issues, and installs with zero friction, but its utility is narrowing as Python versions advance.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or newer; for Python 3.10 and newer, consider using sys.stdlib_module_names instead (built into the standard library).
- Low friction: pure Python wheel with no runtime dependencies.
- Actively maintained as of 2025-10-24 with recent commits; repository is not archived.
License · maintenance · safety
permissive license (permissive) — MIT license (permissive) — you can use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
last release 2025-10-24 (294 days) · last repo commit 2026-08-13 · 141 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,636,519 downloads/mo, #3,700 on PyPI
Alternatives
Verify before relying
from stdlib_list import stdlib_list
libraries = stdlib_list("3.9")
print(libraries)- Whether the library's data for Python 3.11–3.14 is complete and accurate relative to those Python releases.
- Performance characteristics when querying large version ranges or calling the function repeatedly.
What it is and what it does
stdlib-list is a reference package that bundles pre-computed lists of standard library module names for multiple Python versions. It lets you query which modules belong to the standard library for a given Python version (2.6 through 3.14), which is useful when you need to distinguish standard library imports from third-party packages in code analysis or dependency detection tasks.
The package is a simple data lookup tool with no external dependencies. However, the description itself notes that for Python 3.10 and newer, the standard library now exposes sys.stdlib_module_names and sys.builtin_module_names, making this package redundant for modern Python versions. It remains relevant for projects that must support older Python versions or need a unified interface across multiple versions.
Use it for
- Detect whether an imported module is part of the standard library or a third-party package during static analysis.
- Build tools or linters that need to categorize imports by source across multiple Python versions.
- Legacy Python 2.7 or early Python 3 projects that need stdlib membership data without relying on runtime introspection.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you support Python versions older than 3.10 and need to programmatically check stdlib membership.
No, if you target only Python 3.10 or newer — use sys.stdlib_module_names instead. The package is well-maintained, has no security issues, and installs with zero friction, but its utility is narrowing as Python versions advance.
Install
stdlib-list on PyPI
Before you install
Low friction: pure Python wheel with no runtime dependencies. Actively maintained as of 2025-10-24 with recent commits; repository is not archived.
Requires Python 3.9 or newer; for Python 3.10 and newer, consider using sys.stdlib_module_names instead (built into the standard library).
License in practice
MIT license (permissive) — you can use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
Quickstart
from stdlib_list import stdlib_list
libraries = stdlib_list("3.9")
print(libraries)Verify before relying
- Whether the library's data for Python 3.11–3.14 is complete and accurate relative to those Python releases.
- Performance characteristics when querying large version ranges or calling the function repeatedly.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 294 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 1,636,519 / month, #3,700 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Intended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyTopic :: Software Development :: Libraries :: Python Modules |
Evidence: stdlib_list-0.12.0-py3-none-any.whl
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