April 2018
Beginner
238 pages
7h 13m
English
The constructor for the interactive widget has the first argument as the name of the handler to use when the value changes. The second argument is the default value. In this case, we have a checkbox, so the value is False. It could be True as well.
When you click on the box the value changes, triggering a call to the handler. The handler prints out the current value of the box.