Kaleido is a cross-platform library for generating static images for Plotly's visualization library.
After installing it, you can use fig.write_image("filename.png") to save a plot to a file.
The original version of kaleido included a custom build of the Chrome web browser, which made it very large (hundreds of megabytes) and proved very difficult to maintain. In contrast, this version depends on choreographer, a lightweight library that enables remote control of browsers from Python. When you ask kaleido to create an image, it uses choreographer to run a headless instance of Chrome to render and save your figure. Please see choreographer's documentation for details.
The new version of kaleido is a work on progress; we would be grateful for help testing it and improving it. If you find a bug, please report it in our GitHub repository, and please include a minimal reproducible example if you can.
You can install kaleido from PyPI using pip:
$ pip install kaleido
Versions 4.9 and above of the Plotly Python library will automatically use kaleido for static image export when kaleido is installed. For example:
import plotly.express as px
fig = px.scatter(px.data.iris(), x="sepal_length", y="sepal_width", color="species")
fig.write_image("figure.png", engine="kaleido")See the Plotly static image export documentation for more information.