lass="nb">isinstance</span><span class="p">(</span><span class="n">y</span><span class="p">,</span> <span class="n">Time</span><span class="p">):</span>
            <span class="k">if</span> <span class="n">x</span> <span class="o">&lt;</span> <span class="n">y</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">_start_time</span> <span class="o">=</span> <span class="n">x</span>
                <span class="bp">self</span><span class="o">.</spa