start here, this is the easiest place to begin and should serve as a hello world type excersize
once you are comfortable with that, lets check out how we can use simple word extraction
Now lets see how we can interact with our wordcloud from bokeh server
Sorry I cant link you to static html here... you need to download it and run it with bokeh serve examples\python_callbacks_server.py
explore the various options available
explore the various options available
more advanced callback options
subscribe to hover and click events in javascript