="n">r</span><span class="p">,</span> <span class="n">t</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">_num_chunks</span><span class="p">(</span>
        <span class="bp">self</span><span class="p">,</span>
        <span class="n">chunksize</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
    <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">int</span><span class="p">,<