pan><span class="p">()</span>
<span class="n">xy</span><span class="o">.</span><span class="n">eval</span><span class="p">(</span><span class="s2">&quot;$this.pytrace = op(n=0){$py().eval(&#39;pytrace&#39;, {&#39;n&#39;:n});};&quot;</span><span class="p">)</span>
<span class="n">xy</span><span class="o">.</span><span class="n">eval</span><span class="p">(</span><span class="s2">&quot;pytrace(42);&quot;</span><span class="p">)</span>
</code></pre></div></p>
<hr />
<h1 id="all-examples-above-are-verified-to-u