VizControl
Observe what a Python program really does while it runs and explore it as an interactive, hierarchical graph. The graph comes from runtime evidence, not from a model's guess about the code.
pip install vizcontrol
vizcontrol run app.py --some-flag # writes .vizcontrol/runs/<time>-app.vizc
pytest --vizcontrol # or: one trace per test
vizcontrol serve # explore the runs in the browser
vizcontrol info .vizcontrol/runs/<file>.vizc
A failed run opens on its failure: the error path in red, the exception, the locals where it was raised and the last observed changes to the objects involved.
import vizcontrol
with vizcontrol.trace("checkout") as run:
place_order(cart)
print(run.path)
Requires Python 3.12+ (uses sys.monitoring). See docs/ for requirements and architecture.
Development
uv sync # Python package (editable) + pytest
uv run pytest
cd frontend && npm ci && npm run build # viewer -> src/vizcontrol/viewer/static
cd frontend && npm run e2e # drive the built viewer in headless Chrome
uv run python benchmarks/overhead.py
License
VizControl is free software, licensed under the GNU Affero General Public License v3.0 or later. © Datzin · contacto@datzin.com.mx
1 maintainer
Metadata
1 maintainer
Release files for vizcontrol 0.1.0
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| vizcontrol-0.1.0.tar.gz | 113.1 kB | With provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| vizcontrol-0.1.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 1.6 MB
Release files / vizcontrol-0.1.0.tar.gz
| Download URL | vizcontrol-0.1.0.tar.gz |
|---|---|
| Size | 113.1 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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Transparency logRelease files / vizcontrol-0.1.0-py3-none-any.whl
| Download URL | vizcontrol-0.1.0-py3-none-any.whl |
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| Size | 1.5 MB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
0b8fa4a11d73c2f0bc5e07600832089c97528876d6afd613be0c7ec95855760b
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twine/7.0.0 CPython/3.13.14
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Signed by GitHub Actions, verified by PyPI on Oct 20, 2026.
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