a href="#Sublosses.window_diff-40"><span class="linenos">40</span></a>    <span class="n">_mask</span> <span class="o">=</span> <span class="n">tf</span><span class="o">.</span><span class="n">eye</span><span class="p">(</span><span class="n">_divider</span><span class="p">,</span> <span class="n">num_columns</span><span class="o">=</span><span class="n">_b</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">access__</span><span class="p">],</span> <span class="