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The Rerun Python SDK

Use the Rerun SDK to record data like images, tensors, point clouds, and text. Data is streamed to the Rerun Viewer for live visualization or to file for later use.

Rerun Viewer

Install

pip3 install rerun-sdk

ℹ️ Note: The Python module is called rerun, while the package published on PyPI is rerun-sdk.

For other SDK languages see Installing Rerun.

We also provide a Jupyter widget for interactive data visualization in Jupyter notebooks:

pip3 install rerun-sdk[notebook]

Example

import rerun as rr
import numpy as np

rr.init("rerun_example_app", spawn=True)

positions = np.vstack([xyz.ravel() for xyz in np.mgrid[3 * [slice(-5, 5, 10j)]]]).T
colors = np.vstack([rgb.ravel() for rgb in np.mgrid[3 * [slice(0, 255, 10j)]]]).astype(np.uint8).T

rr.log("points3d", rr.Points3D(positions, colors=colors))

Resources

Logging and viewing in different processes

You can run the Viewer and logger in different processes.

In one terminal, start up a Viewer with a server that the SDK can connect to:

python3 -m rerun

In a second terminal, run the example with the --connect option:

python3 examples/python/plots/plots.py --connect

Note that SDK and Viewer can run on different machines!

Building Rerun from source

We use the pixi for managing dev-tool versioning, download and task running. See here for installation instructions.

pixi run py-build --release

To build SDK & Viewer for Python (or pixi run py-build for a debug build) and install it in the Pixi environment.

You can then run examples from the repository, either by making the Pixi shell active with pixi shell -e py and then running Python or by using pixi run -e py, e.g. pixi run -e py python examples/python/minimal/minimal.py.

Respectively, to build a wheel instead for manual install use:

pixi run py-wheel --release

Refer to BUILD.md for details on the various different build options of the Rerun Viewer and SDKs for all target languages.

Installing a pre-release

Prebuilt dev wheels from head of main are available at https://github.com/rerun-io/rerun/releases/tag/prerelease.

While we try to keep the main branch usable at all times, it may be unstable occasionally. Use at your own risk.

Running Python unit tests

pixi run -e py py-build && pixi run -e py py-test

Running specific Python unit tests

pixi run -e py py-build && pixi run -e py pytest rerun_py/tests/unit/test_tensor.py