an class="o">+</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">rand</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span>

<span class="n">opts</span> <span class="o">=</span> <span class="p">{</span><span class="s1">&#39;xlim&#39;</span><span class="p">:</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">9</span><span class="p">),</span> <span class="s1">&#3