python support for earlier version of windows

Question

I am developing a desktop application for windows using pyqt5. I am using python version 3.9. I am not sure about that when i will convert it into exe, will it run on windows 7,8,8.1. Its not commercial. Its a specific purpose-based application. I will convert it into exe and give it to the client. I want my app to run on any version of windows (7+).

I searched for python support for windows went to official python website there I found the support for different versions of python for windows eg this python version cannot run on windows XP or earlier this line was written with python versions 3.5+ but that's for the installation setup not sure if the same thing that after converting to exe the support will also be same. I want that which version of python should i use to build my application such that it runs on windows 7 and higher.

Answer 1

Looking at https://www.python.org/downloads/windows/ we can see

Note how the compatibility notice changed from

Note that Python 3.8.6 cannot be used on Windows XP or earlier.

to

Note that Python 3.9.0 cannot be used on Windows 7 or earlier.

So python 3.8.6 seems to be the last version that officially supported windows 7