Book Image

Hands-On Data Visualization with Bokeh

By : Kevin Jolly
Book Image

Hands-On Data Visualization with Bokeh

By: Kevin Jolly

Overview of this book

Adding a layer of interactivity to your plots and converting these plots into applications hold immense value in the field of data science. The standard approach to adding interactivity would be to use paid software such as Tableau, but the Bokeh package in Python offers users a way to create both interactive and visually aesthetic plots for free. This book gets you up to speed with Bokeh - a popular Python library for interactive data visualization. The book starts out by helping you understand how Bokeh works internally and how you can set up and install the package in your local machine. You then use a real world data set which uses stock data from Kaggle to create interactive and visually stunning plots. You will also learn how to leverage Bokeh using some advanced concepts such as plotting with spatial and geo data. Finally you will use all the concepts that you have learned in the previous chapters to create your very own Bokeh application from scratch. By the end of the book you will be able to create your very own Bokeh application. You will have gone through a step by step process that starts with understanding what Bokeh actually is and ends with building your very own Bokeh application filled with interactive and visually aesthetic plots.
Table of Contents (10 chapters)

Creating widgets to add interactivity to plots

One of Bokeh's most unique features is the ability to add widgets that add interactivity to plots. Widgets allow the user of the plot to change what they want to see by making selections, clicking on buttons, and typing into textboxes. In this section, you will learn about all the widgets that Bokeh can add to your Toolbelt.

The two imports that you will need to create and output any kind of widget are given here:

from bokeh.io import output_file, show
from bokeh.layouts import widgetbox

Creating a button widget

Buttons allow a user to click and make a selection. We can create a button widget in Bokeh by using the code shown here:

#Import the required packages

from bokeh.models...