PyInstaller can detect and automatically package many common Python packages ... A .spec file is used to create an executable with PyInstaller. Note the namespaces listed in excludes.

Briefcase packages apps for all the OSes it supports ... One of BeeWare’s other offerings is a UI toolkit called Toga, for creating GUIs in Python programs using platform-native UI components.

You might be wondering what a Python “package” is, and how it relates ... A single class can be used to create endless “instances” of the object. Also read: How to use classes in Python ...