title: Do regular expressions from the re module support word boundaries (\b)?
body: <p>While trying to learn a little more about regular expressions, a tutorial suggested that you can use the <code>\b</code> to match a word boundary. However, the following snippet in the Python interpreter does not work as expected:</p>
  
  <pre><code>&gt;&gt;&gt; x = 'one two three'
  &gt;&gt;&gt; y = re.search("\btwo\b", x)
  </code></pre>
  
  <p>It should have been a match object if anything was matched, but it is <code>None</code>.</p>
  
  <p>Is the <code>\b</code> expression not supported in Python or am I using it wrong?</p>