[Fixed]-I am newbie to react.js can i use python as a backend and react as a frontend for data science application

Just posting @Sami‘s comment as an answer so you can accept it.

The React site itself has quite good documentation. It doesn’t care what the backend is, or if there even is a backend. That’s all up to you. So to your question in the title: yes, you can. As for should you, that’s an opinion based question and not a good fit for Stack Overflow.