ipycanvas

Interactive widgets library exposing the browser's Canvas API to Python. There are some API differences though:

• The Canvas widget is exposing the CanvasRenderingContext2D API
• All the API is written in snake_case instead of camelCase, so for example c.fillStyle = 'red' becomes c.fill_style = 'red'
• The Canvas widget exposes a clear method, c.clear() is a shortcut for c.clear_rect(0, 0, c.size[0], c.size[1])
• We provide a hold_canvas context manager if you want to perform lots of commands at once
• The Web canvas putImageData method does not support transparency, our Canvas.put_image_data does support it!

Try it online!

You can try it online by clicking on this badge:

Documentation

You can read the documentation following this link: https://ipycanvas.readthedocs.io/en/latest/

Examples

Create John Conway's Game Of Life

Draw Particles from IPython

Custom Sprites

Draw data directly from a NumPy array

Installation

You can install using pip:

pip install ipycanvas

Or using conda:

conda install -c conda-forge ipycanvas

And if you use jupyterlab:

jupyter labextension install @jupyter-widgets/jupyterlab-manager ipycanvas

If you are using Jupyter Notebook 5.2 or earlier, you may also need to enable the nbextension:

jupyter nbextension enable --py [--sys-prefix|--user|--system] ipycanvas

Installation from sources

You can install using pip:

git clone https://github.com/martinRenou/ipycanvas
cd ipycanvas
pip install .

And if you use jupyterlab:

jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter labextension install .

And you use the classical Jupyter:

jupyter nbextension install --py --symlink --sys-prefix ipycanvas
jupyter nbextension enable --py --sys-prefix ipycanvas