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# PyLingual - Python Decompiler for 3.6+
PyLingual is a CPython bytecode decompiler supporting all released Python versions since 3.6. For information about the design and implementation of PyLingual, please refer to our [research paper](https://www.computer.org/csdl/proceedings-article/sp/2025/223600a052/21B7QZB86cg).
PyLingual can be run through our [web service](https://pylingual.io) or run locally.
This codebase is optimized for readability and future extension, so there may initially be some control flow accuracy regression compared to the version hosted on the web service.
## Requirements
- Python 3.12
### Compiling bytecode
Some parts of PyLingual require the ability to compile bytecode in a different Python version (equivalence check and model training). For this, you will need the following:
- [pyenv](https://github.com/pyenv/pyenv) with all Python versions you want to compile to
- [pyenv-win](https://github.com/pyenv-win/pyenv-win) for Windows
## Setup
Install from source, using [Poetry](https://python-poetry.org/):
```sh
git clone https://github.com/syssec-utd/pylingual
cd pylingual
python -m venv venv
source venv/bin/activate
pip install poetry>=2.0
poetry install
```
## Usage
```
Usage: pylingual [OPTIONS] [FILES]...
End to end pipeline to decompile Python bytecode into source code.
Options:
-o, --out-dir PATH The directory to export results to.
-c, --config-file PATH Config file for model information.
-v, --version VERSION Python version of the .pyc, default is auto
detection.
-k, --top-k INT Maximum number of additional segmentations to
consider.
-q, --quiet Suppress console output.
--trust-lnotab Use the lnotab for segmentation instead of the
segmentation model.
--init-pyenv Install pyenv before decompiling.
-h, --help Show this message and exit.
```
## Demo
![demo gif](demo.gif)
## Support
If you have any issues for installing and using PyLingual, please create an issue or send your message via our support email at pylingual.io@gmail.com.