an class="k">def</span> <span class="nf">_step</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">epsilon</span><span class="p">,</span> <span class="n">lr</span><span class="p">,</span> <span class="n">use_uncertainty</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="w">        </span><span class="sd">&quot;&quot;&quot;Perform a step in the environment.</span>

<span class="sd">        Args:</span>
<span class="