How can I remove all whitespace surrounding a Bokeh plot?

I use the Bokeh plotting interface to produce the following image with progressbars for my project:

[![enter image description here](https://i.stack.imgur.com/zWFZo.png)](https://i.stack.imgur.com/zWFZo.png)

From various other stack overflow questions I can figure out how to turn off the grid lines, the tick marks, the labels. However I haven't yet figured out how to cleanly remove all horizontal and vertical padding. 

What is a comprehensive what to remove all visual elements and padding from the canvas other than what I explicitly add?