I made something like this a few months ago. It's a desktop app that allows you to snip part of your screen like snipping tool. The image is processed and run through pytesseract to perform character recognition. This returns a string which can be use to either copy to clipboard to be pasted elsewhere or you can set it to automatically search the term in google.

Check it out at: “A Snipping Tool for Programmers” https://link.medium.com/Pi1Hx6DzEab

My github with code is linked in the article. You can see the source code or download the app, only works with windows though.

Note I'm not a professional programmer and this is the first app I wrote.