class="o">=</span><span class="p">[</span><span class="s1">&#39;a&#39;</span><span class="p">],</span> <span class="n">mode</span><span class="o">=</span><span class="n">mode</span><span class="p">)</span>
    <span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">m3tl</span><span class="o">.</span><span class="n">TRAIN</span><span class="p">:</span>
        <span class="n">d</span> <span class="o">=</span> <span class="p">{</span>
            <span class="s1">&#39;i