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Contributing to Visdom

We want to make contributing to this project as easy and transparent as possible.


Before you post an issue on our tracker, please check the following list of issues to see if it resolves your issue. If this document does not resolve your problem, please scroll all the way down for details on how to report an issue.

In all your interactions with us, please keep in mind that visdom is a side project that we work on in our spare time. We are happy to help, but there are no engineers dedicated to visdom so we cannot accommodate all your requests and questions right away.

Issue: I cannot connect to the visdom server. First, check that your visdom server is running. You can start the visdom server via python -m visdom.server. Try restarting the server.

If your visdom server is running, but you don't see anything when trying to access visdom in your browser, please check that your network settings don't block traffic between the visdom server and your browser. Traffic may be blocked by a firewall, or you may need to specify a proxy server when starting the visdom server (via the -proxy option). In some cases, it may help to set up an SSH tunnel to your server by adding the following line to your local ~/.ssh/config: LocalForward It's also possible that the port is being blocked by your firewall, and some users have reported that the sudo ufw allow 8097 command helps them.

Issue: I see a blue screen in my browser, but I do not see visualizations. There may be an issue with downloading the JavaScript dependencies. This is, unfortunately, a common issue for users in China. In Chrome, click View → Developer → JavaScript Console to check for errors related to missing JavaScript dependencies. If such errors appear, you can try to download and install the dependencies manually:

  • Navigate to /home/$USERNAME/$ANACONDA_FOLDER/lib/python$PYTHON_VERSION/site-packages/visdom-$VISDOM_VERSION-py$PYTHON_VERSION.egg. Note that the variables $ANACONDA_FOLDER, $PYTHON_VERSION, and $VISDOM_VERSION may not be set and depend on your configuration. Furthermore, if you are installing from source or using another method of installing dependancies, the folder to use may be different.

  • View the script and either execute it to automatically download the resources or manually download all the files that it requests.

  • Restart the visdom server, try again, and check the JavaScript Console to confirm all dependencies are found.

Issue: I would like to make a plot that has feature X: To produce visualizations, visdom uses Specifically, the client code produces a JSON-structure that is passed on to by the server. This implies that, given the right input, visdom can display any visualization that supports. You can find an up-to-date guide to features here.

The visdom exposes easy access to the most common features, but does not expose all of them. You are more than welcome to hack the client code producing the data structure (in py/ to include the feature you want to use. All available options for each plot type are described in the manual. You can even construct your own plot data structure from scratch, and _send it to the visdom server directly.

If you believe a feature is so generally useful that it should be exposed directly in the visdom client, please send us a pull request; we will happily accept them!

Issue: I want to use a recently added visdom feature that is not in the pip version: You can always install visdom from source. Clone the Github repo (and make your own code changes, if any). In the visdom source folder, run:

pip uninstall visdom && pip install -e .

For some pip installs, this approach does not always properly link the visdom module. In that case, try running python install instead.

How to report an issue:

If you identified a bug, please include the following information in your bug report:

  1. The error message produced by the visdom server (if any). Copy-paste this error message from your Terminal.
  2. The error message produced by the JavaScript Console (if any). In Chrome, click View → Developer → JavaScript Console. Copy-paste any warnings or errors you see in this console.
  3. The platform that you're running on (OS, browser, visdom version).

This information will help us to more rapidly identify the source of your issue.

Pull Requests

We actively welcome your pull requests.

  1. Fork the repo and create your branch from master.
  2. If you've added code that should be tested, add tests.
  3. If you've changed APIs, update the documentation.
  4. Ensure the Lua and Python interfaces to Visdom are in sync.
  5. If you change js/, commit the React-compiled version of main.js. For details, please see Contributing to the UI below.
  6. Add demos for new features. Ensure the demos work.
  7. Make sure your code lints.
  8. If you haven't already, complete the Contributor License Agreement ("CLA").

Contributing to the UI

The UI is built with React. This means that js/ needs to be compiled. This can be done with yarn or npm. To clarify an inconsistency, Panes in the UI are the containers for the 'windows' referred to by the Python and Lua APIs.


You can find instructions for install yarn here.

cd /path/to/visdom
yarn             # install node dependencies
yarn run build   # build js


You can find instructions for installing npm here.

cd /path/to/visdom
npm install       # install node dependencies
npm run build     # build js

Contributor License Agreement ("CLA")

In order to accept your pull request, we need you to submit a CLA. You only need to do this once to work on any of Facebook's open source projects.

Complete your CLA here:


We use GitHub issues to track public bugs. Please ensure your description is clear and has sufficient instructions to be able to reproduce the issue.

Facebook has a bounty program for the safe disclosure of security bugs. In those cases, please go through the process outlined on that page and do not file a public issue.

Coding Style

  • 3 spaces for indentation rather than tabs for Lua
  • Follow PEP 8 for Python
  • 80 character line length


By contributing to Visdom, you agree that your contributions will be licensed under the LICENSE file in the root directory of this source tree.

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