    :return: returning total amount of runtime taken by the mining process</span>
<span class="sd">        :rtype: float</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_endTime</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">_startTime</span></div>

    <span class="k">def</span> <span class="nf">_construct</span><span class="p">(</span><spa