s="n">DEFAULT_CONFIG</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">config</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">config</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">iterated</span> <span class="o">=</span> <span class="mi">0</span> <span class="c1"># keep tracks how many times optimizer iterated</span>

        <span class="bp">self</span><span class=