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  <h1>Source code for dataframe.match</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">fast_causal_inference.lib.tools</span> <span class="k">as</span> <span class="nn">ais_tools</span>
<span class="kn">from</span> <span class="nn">fast_causal_inference.dataframe</span> <span class="kn">import</span> 