n><span class="p">)</span>
        <span class="n">subranges</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="n">prev_time</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">start</span>
        <span class="n">next_time</span> <span class="o">=</span> <span class="kc">None</span>
        <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class