Add 3rd example to chapter3

v2/chapter3/3-getRandomLinks.py

@@ -0,0 +1,20 @@
+from urllib.request import urlopen
+from bs4 import BeautifulSoup
+import datetime
+import random
+import re
+
+
+def getLinks(articleUrl):
+    html = urlopen('http://en.wikipedia.org{}'.format(articleUrl))
+    bs = BeautifulSoup(html, 'html.parser')
+    regex = re.compile('^(/wiki/)((?!:).)*$')
+    return bs.find('div', {'id':'bodyContent'}).find_all('a', href=regex)
+
+
+random.seed(datetime.datetime.now())
+links = getLinks('/wiki/Kevin_Bacon')
+while len(links) > 0:
+    newArticle = links[random.randint(0, len(links)-1)].attrs['href']
+    print(newArticle)
+    links = getLinks(newArticle)