title: Do Python regular expressions have an equivalent to Ruby's atomic grouping?
body: <p>Ruby's regular expressions have a feature called atomic grouping <code>(?&gt;regexp)</code>, described <a href="http://www.ruby-doc.org/core-1.9.3/Regexp.html#label-Atomic+Grouping">here</a>, is there any equivalent in Python's <code>re</code> module?</p>