> <span class="n">tf</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">_a</span> <span class="o">&gt;</span> <span class="n">th</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
</span><span id="Sublosses.window_diff-27"><a href="#Sublosses.window_diff-27"><span class="linenos">27</span></a>    <span class="n">_b</span> <span class="o">=</span> <span class="n">tf</span><span class