abi3info
abi3info exposes information about CPython's "limited API" (including the
stable ABI, called abi3) as a Python library.
Installation
abi3info is available via pip:
$ pip install abi3info
Usage
abi3info exposes limited API and stable ABI information in the form of a set of top-level dictionaries, namely:
import abi3info
abi3info.FEATURE_MACROS
abi3info.MACROS
abi3info.STRUCTS
abi3info.TYPEDEFS
abi3info.FUNCTIONS
abi3info.DATAS
Each of these is a mapping of a name (either as str or Symbol) to
a data model describing the kind of item (e.g. FeatureMacro or Function).
See the generated documentation for more details, including comprehensive type hints and explanations of each data model.
See also the stable_abi.toml file, taken from
the CPython sources, which describes each model and their semantics.
Examples
Get information about a particular function:
from abi3info import FUNCTIONS
from abi3info.models import Symbol
func = FUNCTIONS[Symbol("_Py_NegativeRefcount")]
print(func.symbol, func.added, func.ifdef, func.abi_only)
Get information about the feature macros that control the limited API:
from abi3info import FEATURE_MACROS
print([fm for fm in FEATURE_MACROS.values()])
Licensing
abi3info is licensed under the MIT license.
abi3info is partially generated from metadata retrieved from the CPython sources, which is licensed under the PSF license.
1 maintainer
Release files for abi3info 2026.9.25
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Source distribution (sdist)
| File | Size | Uploaded | |
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| abi3info-2026.9.25.tar.gz | 21.1 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| abi3info-2026.9.25-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 41.7 kB
Release files / abi3info-2026.9.25.tar.gz
| Download URL | abi3info-2026.9.25.tar.gz |
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| Size | 21.1 kB |
| Tags | Source |
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| Size | 20.6 kB |
| Tags | Python 3 |
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