This is a sample project that shows how to debug PyO3 extension using Visual Studio Code. It allows to set breakpoints in Python sources and tests, as well as in Rust sources, and step through Python and Rust code simultaneously. This was tricky to set up, so I thought I'd share my configuration.
This project assumes you have a Python and Rust toolchain up and running. In Visual Studio Code, make sure you have the following extensions installed:
Create a virtual environment and install the required packages:
python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
There are two launch configurations:
-
Debug Script: Debug the current active Python script. This is the most common use case. You can set breakpoints in Python code and step through it.
-
Debug Test: Debug the current active Python test. It assumes that you are using pytest as your test runner. You can set breakpoints in Python code and step through it.
MIT License
Copyright (c) 2025 Martin Donath
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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