>=</span> <span class="n">param</span><span class="p">[</span><span class="s1">&#39;lr&#39;</span><span class="p">]</span>
        <span class="n">params</span><span class="p">[</span><span class="s1">&#39;progress&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">progress</span>
        <span class="k">return</span> <span class="p">{</span>
            <span class="o">**</span><span class="n">params</span><span class="p">,</span