Why bokeh doesn’t support Pivot Table…? Pandas has pivot table. To plot that, bokeh doesn’t support any tables. Or are we missing something. Because we can’t find it in your docs.
Open Source software is a volunteer endeavor. This feature doesn’t exist because no-one has ever decided to work on it. Or for that matter, ever asked for it. FWIW yours is the first request regarding pivot tables I can recall, in nearly eight years, so it’s never been perceived as a priority. If you’d like to discuss adding support for using Pandas pivot tables more directly (especially if you can collaborate on making it happen), the first step is to make a GitHub feature request issue. Bear in mind, the more detailed and thorough proposal you can make, the better.