><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="n">m1</span><span class="p">)</span><span class="o">.</span><span class="n">dt</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">()</span><span class="o">.</span><span class="n">div</span><span class="p">(</span><span class="mi">60</span><span class="p">)</span><span class="o">.</span><span class="n">astype</span><span class="p">(</span><span class="nb">int</span><span class="p">)</span>
 