title: Lookahead & Lookbehind including markers?
body: <p>Is it possible to include the markers in a lookahead &amp; lookbehind search?</p>
  
  <p>Example:</p>
  
  <pre><code>str = "my cat is the best pet in the world"
  re.findall('(?s)(?&lt;=cat)(.*?)(?=pet)', str)
  </code></pre>
  
  <p>will return "is the best"
  what I want is "cat is the best pet"</p>
  
  <p>thanks!</p>