Add a Section Introducing the Requests and BeautifulSoup Packages

[runderwood]

Provide an introductory example, aligned with the exercises in the browser console, that fetches a document from a given url and scrapes data from its markup using Python requests and BeautifulSoup.

[vphill]

A little more context on this ticket.

This ticket will build off of the basic structure from a perviously created scraping tutorial from the University of Oklahoma - http://ouinformatics.github.io/swc_beautiful_soup/

Instead of the supplied URLs we will use the United Nations Security Council Resolutions found here - http://www.un.org/en/sc/documents/resolutions/

Here is the basic idea for the lesson:

• Load the page with Requests and BeautifulSoup
• Extract the links from the page
• Limit the links to just the years of resolutions
• Output the links to the page that lists resolutions by year
• Load one year and display page contents

The next section in the lesson will dive deeper into using Python and BeautifulSoup as well as diving a little further into the data on the site.

[jnothman]

It turns out the UNSC resolutions dataset that was suggested as a scraping target is very quirky in terms of variation from year to year. See ctds-usyd#2 where I've built scrapers for it in multiple frameworks