This release is a pre-release and may not be stable for production use.
pymsi
A pure Python library for reading and manipulating Windows Installer (MSI) files. Based on the rust msi crate and msitools utilities.
Getting Started
For a demo of what pymsi can do, check out the online MSI viewer and file extractor on our ReadTheDocs site. It's like lessmsi, but runs fully client-side in your browser.
For more in-depth documentation on pymsi usage and the API, see the documentation (very early WIP).
Installation
pymsi is available on PyPI (PEP 541 request for pymsi name is being processed):
pip install python-msi
It is recommended to either install it in a virtual environment, or use a tool such as pipx or uv to avoid potential conflicts with other Python modules on the same system.
Usage
To use pymsi as a library that gets called from other code:
import pymsi
To use pymsi as a command line tool:
pymsi <command> [path_to_msi_file] [output_folder]
Use the help command to see a list of supported commands:
Available commands:
tables - List all tables in the MSI file
dump - Dump the contents of the MSI file
test - Check if the file is a valid MSI file
extract - Extract files from the MSI file
help - Show this help message
Getting Involved
For questions or support, please create a new discussion on GitHub Discussions, or open an issue for bug reports and feature requests.
Contributing
Contributions are welcome. Bug fixes or minor changes are preferred via a pull request to the pymsi GitHub repository. For more information on contributing see the CONTRIBUTING file.
License
pymsi is released under the MIT license. See the LICENSE and NOTICE files for details. All new contributions must be made under this license.
SPDX-License-Identifier: MIT
LLNL-CODE-862419
1 maintainer
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