ariable that will be added externally from the centralized data source</span>
<span class="sd">    Returns:</span>
<span class="sd">        envs.dc_gym.dc_gymenv: The environment instantiated with the particular month.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">observation_variables</span> <span class="o">=</span> <span class="p">[]</span>
    <span class="c1">############################################################################</span>
    <span class="c1">#############