How to convert python .py file into an executable file for use cross platform?

Question

I\'ve been searching through SO for a while now trying to come up with an answer to this but due to my inexperience with programming I don\'t understand much of the document

Answer 1

Python scripts can be made directly executable, like shell scripts, by putting the python environment path in the top of the script file.

#!/usr/bin/env python3.5 

The Python installer automatically associates .py files with python.exe so that a double-click on a Python file will run it as a script. The extension can also be .pyw, in that case, the console window that normally appears is suppressed.

Detailed description also for linux is here.