list of gym environments to run in subprocesses</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">waiting</span> <span class="o">=</span> <span class="kc">False</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">closed</span> <span class="o">=</span> <span class="kc">False</span>
        <span class="n">nenvs</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><s