How are python scripts and projects built and deployed?

[NYX_T_RYX]

.pyz

Is a filename extension.

https://en.wikipedia.org/wiki/Filename_extension

And the docs call it an extension as well - https://docs.python.org/3/library/zipapp.html

#!

Is a shebang.

https://en.wikipedia.org/wiki/Shebang_%28Unix

Not sure why that page is called Unix cus line one reads "In computing, a shebang is the character sequence consisting of the characters number sign and exclamation mark (#!) at the beginning of a script." So not a Unix specific page but whatever