/span><span class="s1">'No samples found for class: </span><span class="si">{</span><span class="n">clazz</span><span class="si">}</span><span class="s1">'</span><span class="p">)</span>
    <span class="k">if</span> <span class="n">errs</span><span class="p">:</span>
        <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s1">'</span><span class="se">\n</span><span class="s1">'</span><span class="o">.</span><span class="n">join</span><span class="p">(</