an> <span class="special">(</span><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">rank</span><span class="special">,</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">size</span><span class="special">)</span>
</pre>
<p>
        Go ahead and run this program with several processes. Be sure to invoke the
        <code class="computeroutput"><span class="identifier">python</span></code> interpreter from
        <code class