ass="p">,</span> <span class="n">offset</span><span class="p">):</span>
    <span class="k">return</span> <span class="n">xs</span> <span class="o">+</span> <span class="n">offset</span>

<span class="n">opts</span> <span class="o">=</span> <span class="p">{</span>
    <span class="s1">&#39;ylim&#39;</span><span class="p">:</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">20</span><span class="p">),</span>
<span class="p">}</span>

<span class="n">nbi</span><