You are downloading the Python 3 XAP file v184.108.40.206 for Windows Phone. Python 3 is a free and useful Education app: Python 3 For Windows Phone is a Windows Phone 8 app that provides an interactive Python shell. You can run scripts either interactively, by typing ... You can now download the offline XAP file to install & try it.
Download Locations for Python 3 220.127.116.11 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Python 3 XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.