abi3info

library2025.11.29pypypi✓ verified 79d ago

abi3info is a Python library that provides programmatic access to information about CPython's stable ABI (Application Binary Interface), commonly referred to as 'abi3'. This includes details on types, functions, and macros available for creating compatible C extension modules. The current version is 2025.11.29, and it has a high release cadence, often driven by automated updates to its internal ABI data.

serialization devops

pip install abi3info

github ↗package ↗homepage ↗docs ↗

INSTALL

IMPORT

SIG · ABI3INFO

abi3info

serializationpythonv2025.11.29

Install

1.6s avg

Import

871ms

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 v2025.11.29 · 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 3.10–3.910 runs

installs and imports cleanly · install 0.0s · import 0.864s · 18.2MB

glibc

py 3.10–3.910 runs

installs and imports cleanly · install 1.6s · import 0.877s · 19MB

16MB installed

● package 16MB

Code

Verified usage

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

DATAS

✓ from abi3info import DATAS

✗ from abi3info import get_abi_info

Data

✓ from abi3info import Data

✗ from abi3info import get_abi_info

Symbol

✓ from abi3info import Symbol

✗ from abi3info import get_abi_info

This quickstart demonstrates how to fetch ABI information for a specific Python version and for the currently running interpreter. It shows how to access members and their signatures from the returned AbiInfo object.

import abi3info # Get ABI information for a specific Python version (e.g., 3.11) python_version = '3.11' try: abi = abi3info.get_abi_info(python_version) print(f"ABI information for Python {python_version}:") print(f" Version: {abi.version}") print(f" First ABI version: {abi.first_abi_version}") # Access a specific member, e.g., PyUnicode_FromWideChar if 'PyUnicode_FromWideChar' in abi.members: member = abi.members['PyUnicode_FromWideChar'] print(f" PyUnicode_FromWideChar signature: {member.signature}") else: print(f" PyUnicode_FromWideChar not found in ABI for {python_version}") # Get ABI information for the current Python interpreter current_abi = abi3info.get_current_abi_info() print(f"\nABI information for current Python ({current_abi.version}):") print(f" First ABI version: {current_abi.first_abi_version}") except ValueError as e: print(f"Error: {e}. Check available Python versions with abi3info.SUPPORTED_VERSIONS.")

Debug

Known issues

gotchaThe ABI data provided by abi3info (e.g., `stable_abi.toml`) is frequently updated. This means the specific set of available members or their exact signatures for a given Python target version can change between different versions of the `abi3info` library.

fix

Always use the latest version of `abi3info` if you require the most up-to-date ABI data. Be aware that relying on specific ABI signatures in your code might require `abi3info` updates.

affects: All versions

breakingThe `abi3info` library requires Python 3.10 or newer. Attempting to install or run it on older Python versions will result in an installation error or runtime syntax errors.

fix

Ensure your environment uses Python 3.10 or a newer version (e.g., `python3.10 -m pip install abi3info`).

affects: <3.10

gotchaThe `abi3` refers to a stable subset of the CPython API. It does not include all CPython internal functions. Attempting to query information for non-abi3 functions or non-existent members will result in KeyError or AttributeError.

fix

Refer to the `members` dictionary on the `AbiInfo` object to see available entries. Understand the scope of `abi3` before querying specific symbols.

affects: All versions

Upgrade

Version history

2025.11.29latest on PyPI · released Nov 29, 2025

Audit

Dependencies

No dependency data recorded yet.

Agent activity

48 hits · last 30 days

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OpenAI (training)

Resources

githubhttps://github.com/woodruffw/abi3info ↗

packagehttps://pypi.org/project/abi3info/ ↗

homepagehttps://pypi.org/project/abi3info/ ↗

docshttps://woodruffw.github.io/abi3info/ ↗