In this segment we learn to pull out data from strings after a regular expression has found a match.

We look at how some of the string parsing we have done in earlier chapters can be easily done with regular expressions.

We take a very brief look at how software communicates across the Internet using TCP/IP.

In this section we look at the HTTP protocol that is used to move documents between web servers and web browsers.

We write a simple Python program that connects to a web server and retrieves a web document. It is a very simple web browser.

Worked Example: Sockets

We explore how characters are encoded when they are transported across the network.

We write an even simpler Python program to retrieve a web page using the urllib library in Python.

Worked Example: Using urllib

Now we will look at the HypertextMarkup Language (HTML) that we retrieved using Python and extract links from that HTML. We are slowly building a very simple web search engine.