Hi Deepika,

As per your question, these are the links I have found. I suppose these links might help you.

https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-sphinx-on-ubuntu-16-04 
http://www.sphinx-doc.org/en/1.5.1/tutorial.html 
https://gisellezeno.com/tutorials/sphinx-for-python-documentation.html

Thanks