lass="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">start</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="n">TIME_FORMAT</span><span class="p">)</span>
        <span class="n">end_time</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">end</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="n">TIME_FORMAT</span><span class="p">)</s