le <tt>Twitter</tt>, then 
loops through the rows and prints out each row.<br />
<br />
If we run this program after the first execution of our Twitter
spider above, its output will be as follows:
</font><pre><font size="4" color="blue">
(u'opencontent', 0, 1)
(u'lhawthorn', 0, 1)
(u'steve_coppin', 0, 1)
(u'davidkocher', 0, 1)
(u'hrheingold', 0, 1)
...
20 rows.
</font></pre><font color="black">We see one row for each <code>screen_name</code>, that we 
have not retrieved the data for that <code>screen_name</