stdlib-list

library0.12.0pypypi✓ verified 24d ago

A Python library that provides lists of all standard library modules for various Python versions (currently 2.7 through 3.14). It is actively maintained with updates for new Python releases. This library is particularly useful for static analysis and tooling that needs to differentiate between standard library and third-party modules. For Python 3.10 and newer, `sys.stdlib_module_names` offers similar functionality.

type-stubs

pip install stdlib-list

github ↗package ↗homepage ↗docs ↗

INSTALL

IMPORT

SIG · STDLIB-LIST

stdlib-list

type-stubspythonv0.12.0

Install

1.6s avg

Import

18ms

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v0.12.0 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.018s · 18.1MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.6s · import 0.014s · 19MB

16MB installed

● package 16MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

stdlib_list

✓ from stdlib_list import stdlib_list

This example demonstrates how to import `stdlib_list` and retrieve the list of standard library modules for a specific Python version, or for the latest version supported by the package.

from stdlib_list import stdlib_list # Get a list of standard library modules for Python 3.9 libraries_3_9 = stdlib_list("3.9") print(f"Python 3.9 stdlib modules (first 5): {libraries_3_9[:5]}") # Get a list for the latest supported Python version (e.g., 3.14 in v0.12.0) libraries_latest = stdlib_list("3.14") print(f"Python 3.14 stdlib modules (first 5): {libraries_latest[:5]}") # Check if a module is in the standard library for a specific version is_os_in_3_9 = "os" in libraries_3_9 print(f"'os' in Python 3.9 stdlib: {is_os_in_3_9}")

Debug

Known issues

gotchaFor Python 3.10 and newer, Python's built-in `sys.stdlib_module_names` and `sys.builtin_module_names` provide similar functionality to identify standard library modules. This library might be redundant for such environments if only the currently running Python's stdlib list is needed.

fix

Consider using `sys.stdlib_module_names` or `sys.builtin_module_names` for newer Python versions.

affects: Python >= 3.10

breakingSupport for Python 3.7 and 3.8 was dropped starting from `stdlib-list` version 0.11.0. Users on these Python versions will need to use an older `stdlib-list` version.

fix

Upgrade your Python environment to 3.9+ or pin `stdlib-list` to a version older than 0.11.0 (e.g., `stdlib-list==0.10.0`).

affects: stdlib-list >= 0.11.0 on Python 3.7, 3.8

deprecatedThe `types-stdlib-list` package is a separate type stub package that becomes unnecessary for `stdlib-list` versions 0.9.0 and newer, as type annotations are now included directly in the main library.

fix

Uninstall `types-stdlib-list` if your `stdlib-list` version is 0.9.0 or greater to avoid potential conflicts or redundant dependencies.

affects: stdlib-list >= 0.9.0 (when `types-stdlib-list` is also installed)

gotchaThe `stdlib-list` project was originally archived by its creator after version 0.8.0. It was subsequently transferred to the `pypi` organization and is now actively maintained by new contributors. While the transition was managed to ensure continuity, it's a historical note if referencing very old documentation or issues.

fix

Ensure you are referencing the official `pypi/stdlib-list` GitHub repository and PyPI page for the most up-to-date information and project status.

affects: All versions, particularly relevant for versions around and after 0.8.0.

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'stdlib_list'

The `stdlib-list` package has not been installed in the current Python environment.

fix

pip install stdlib-list

ValueError: Invalid Python version 'X.Y'. Must be one of ['2.7', '3.5', ..., '3.14']

The specified Python version for which to retrieve standard library modules is not supported by the `stdlib-list` library.

fix

from stdlib_list import stdlib_list
supported_versions = stdlib_list.get_supported_versions()
# Use one of the supported version strings, e.g., stdlib_list.get_stdlib_list('3.9')

TypeError: 'module' object is not callable

The `stdlib_list` object imported from the `stdlib_list` package is the module itself, containing the methods directly, and should not be treated as a class that needs instantiation.

fix

from stdlib_list import stdlib_list
# Call methods directly on the imported 'stdlib_list' object, without parentheses
python_38_stdlib = stdlib_list.get_stdlib_list('3.8')

Upgrade

Version history

0.12.0latest on PyPI · released Oct 24, 2025

Audit

Dependencies

pythonrequiredRuntime dependency for the library.

Agent activity

15 hits · last 30 days

node

Amazon

OpenAI (training)

Resources

githubhttps://github.com/pypi/stdlib-list ↗

packagehttps://pypi.org/project/stdlib-list/ ↗

homepagehttps://pypi.org/project/stdlib-list/ ↗

docshttps://pypi.github.io/stdlib-list/ ↗