roslibpy: ROS Bridge library

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Python ROS Bridge library allows to use Python and IronPython to interact with ROS, the open-source robotic middleware. It uses WebSockets to connect to rosbridge 2.0 and provides publishing, subscribing, service calls, actionlib, TF, and other essential ROS functionality.

Unlike the rospy library, this does not require a local ROS environment, allowing usage from platforms other than Linux.

The API of roslibpy is modeled to closely match that of roslibjs.

Main features

  • Topic publishing and subscribing.

  • Service calls (client).

  • Service advertisement (server).

  • ROS parameter management (get/set/delete).

  • ROS API services for getting ROS meta-information.

  • Actionlib support for interfacing with preemptable tasks.

  • TF Client via the tf2_web_republisher.

Roslibpy runs on Python 3.x and IronPython 2.7.


To install roslibpy, simply use pip:

pip install roslibpy

For IronPython, the pip command is slightly different:

ipy -X:Frames -m pip install --user roslibpy

Remember that you will need a working ROS setup including the rosbridge server and TF2 web republisher accessible within your network.


The full documentation, including examples and API reference is available on readthedocs.


Make sure you setup your local development environment correctly:

  • Clone the roslibpy repository.

  • Create a virtual environment.

  • Install development dependencies:

pip install -r requirements-dev.txt

You’re ready to start coding!

During development, use pyinvoke tasks on the command prompt to ease recurring operations:

  • invoke clean: Clean all generated artifacts.

  • invoke check: Run various code and documentation style checks.

  • invoke docs: Generate documentation.

  • invoke test: Run all tests and checks in one swift command.

  • invoke: Show available tasks.

For more details, check the Contributor’s Guide available as part of the documentation.

The default branch was recently renamed to main. If you’ve already cloned this repository, you’ll need to update your local repository structure with the following lines:

git branch -m master main
git fetch origin
git branch -u origin/main main

Releasing this project

Ready to release a new version roslibpy? Here’s how to do it:

  • We use semver, i.e. we bump versions as follows:

    • patch: bugfixes.

    • minor: backwards-compatible features added.

    • major: backwards-incompatible changes.

  • Update the CHANGELOG.rst with all novelty!

  • Ready? Release everything in one command:

invoke release [patch|minor|major]
  • Profit!


This library is based on roslibjs and to a large extent, it is a line-by-line port to Python, changing only where a more idiomatic form makes sense, so a huge part of the credit goes to the roslibjs authors.