ot;</span>
<span class="sd">    An abstract asynchronous, vectorized environment.</span>
<span class="sd">    Used to batch data from multiple copies of an environment, so that</span>
<span class="sd">    each observation becomes an batch of observations, and expected action is a batch of actions to</span>
<span class="sd">    be applied per-environment.</span>
<span class="sd">    &quot;&quot;&quot;</span>

    <span class="n">closed</span> <span class="o">=</span> <span class="kc">False</span>
    <span c