I need to make an app that uses Python to search for specific names on a website. For instance, I have to check if the string "Robert Paulson" is being used on a website. If it is, it returns True. Else, false. Also,is there any library that can help me make that?
Since you have not attempted to make your application first, then I am not going to post code for you. I will however, suggest using:
urllib2: 
A robust module for interacting with webpages. i.e. pull back the html of a webpage.
BeautifulSoup (from bs4 import BeautifulSoup):
An awesome module to "regex" html to find what is is that you're looking for.
Good luck my friend!
Finding specific names on a website using Python