>
<span class="kn">import</span> <span class="nn">warnings</span>

<span class="n">__author__</span> <span class="o">=</span> <span class="s2">&quot;Joseph Montoya&quot;</span>
<span class="n">__copyright__</span> <span class="o">=</span> <span class="s2">&quot;Copyright 2012, The Materials Project&quot;</span>
<span class="n">__credits__</span> <span class="o">=</span> <span class="s2">&quot;Maarten de Jong, Mark Asta, Anubhav Jain&quot;</span>
<span class="n">__version__</span> <span class="o">=</span> <s