   <span class="def">def</span>
        <span class="name">window_diff</span><span class="signature pdoc-code multiline">(<span class="param">	<span class="n">a</span><span class="p">:</span> <span class="n">tensorflow</span><span class="o">.</span><span class="n">python</span><span class="o">.</span><span class="n">framework</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">Tensor</span>,</span><span class="param">	<span class="n">b</span><span class="p">:</spa