Kivy apps have a default build() method, which you can see here; it just returns an empty widget . Generally kivy has two methods to create the root widget tree, either through overriding build() or by defining a root widget in a kv file. For more information see the documentation on creating an application.
Read moreWhat is KIVY used for?
Kivy is a really interesting GUI framework that you can use to create desktop user interfaces and mobile applications on both iOS and Android . Kivy applications will not look like the native apps on any platform.
Read more