n><span class="n">mmap</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">fileno</span><span class="p">(),</span> <span class="mi">0</span><span class="p">,</span> <span class="n">prot</span><span class="o">=</span><span class="n">mmap</span><span class="o">.</span><span class="n">PROT_READ</span><span class="p">)</span>

            <span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="nb">iter</span><span class="p">(</span