>Once we know the key value for both the Twitter user
and the friend in the JSON, it is a simple matter to insert
the two numbers into the <tt>Follows</tt> table
with the following code:
</font><pre><font size="4" color="blue">
cur.execute('INSERT OR IGNORE INTO Follows (from_id, to_id) VALUES (?, ?)',
    (id, friend_id) )
</font></pre><font color="black">Notice that we let the database take care of keeping us from "double-inserting"
a relationship by creating the table with a uniqueness constraint and the