How to write a files displaying window in python

I have a folder that contains a number of encrypted pictures. I want to make a program that lets me display these pictures unencrypted just like how in the picture above, my main issue right now is how do I write a files displaying window ? I'm using tkinter so if you know how I can do that using tkinter that'd be great, and if you do know any other frameworks/modules/or even other languages that let's me do this than please let me know. thanks in advanced.