This is the PyPy standard interpreter translated to C with the following features:
<ul>
   <li><b>Stackless</b> - You can use all stackless features including
   tasklets, channels, coroutines and greenlets, more information and some
   examples can be found in the 
   <a href="http://codespeak.net/pypy/dist/pypy/doc/stackless.html">PyPy stackless documentation</a>.
   </li>
   <li><b>Transparent proxy</b> - This is a unique PyPy interpreter feature,
   which allows you to provide an application-level controller for any kind of
   object. Details and snippets can be found in the
   <a href="http://codespeak.net/pypy/dist/pypy/doc/objspace-proxies.html#tproxy">transparent proxy documentation</a>. Example (<a href="javascript:execute_snippet('pypy-c', 0)">execute</a>):
   <pre>%s</pre>
   </li>
</ul>