/span>
    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">env_fns</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">envs</span> <span class="o">=</span> <span class="p">[</span><span class="n">fn</span><span class="p">()</span> <span class="k">for</span> <span class="n">fn</span> <span class="ow">in</span> <span class="n">env_fns</span><span class