class="token operator">=</span> NATS<span class="token punctuation">(</span><span class="token punctuation">)</span>

<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">error_cb</span><span class="token punctuation">(</span>e<span class="token punctuation">)</span><span class="token punctuation">:</span>
    <span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">&quot;Error:&quot;</span><span class=