Changes in packages

Python now includes a package called typing in the standard library that contains classes and functions supporting the usage of type hints.

Python also includes a package called zipapp in the standard library.

The zipapp package makes it easy to construct .pyz files. A .pyz file is an archive file containing Python code and arbitrary read-only data, which the Python runtime is able to execute as a self-contained program. Once a program is debugged and ready for distribution, packaging it into a .pyz file is a simple and smart way to hand it to the users.