 retrieval job.</span>

<span class="sd">    end : str</span>
<span class="sd">        The end date of the retrieval job.</span>

<span class="sd">    Return</span>
<span class="sd">    ------</span>
<span class="sd">    start : str</span>
<span class="sd">        The start date of the retrieval job.</span>

<span class="sd">    end : str</span>
<span class="sd">        The end date of the retrieval job.</span>

<span class="sd">    &#39;&#39;&#39;</span>
    <span class="c1"># check for having at least a s