Button widgets

It's time to practice adding buttons to your interactive visualizations. Your job in this exercise is to create a button and use its on_click() method to update a plot.

All necessary modules have been imported for you. In addition, the ColumnDataSource with data x and y as well as the figure have been created for you and are available in the workspace as source and plot.

When you're done, be sure to interact with the button you just added to your plot, and notice how it updates the data!

Create a button called button using the function Button() with the label 'Update Data'.
Define an update callback update() with no arguments.
Compute new y values using the code provided.
Update the ColumnDataSource data dictionary source.data with the new 'y' value.
Add the update callback to the button using on_click().

Exercise

Button widgets

Instructions