 astar.
Default is 3.</p>
<p><strong>verbose</strong>: bool.
Whether to log messages related to search procedure.</p>
<p><strong>max_parents</strong>: int.
The maximum number of parents a node can have. If used, this means
using the k-learn procedure. Can drastically speed up algorithms.
If None, no max on parents. Default is None.</p>
</section>
<section id="returns">
<h2>Returns<a class="headerlink" href="#returns" title="Permalink to this headline"></a></h2>
<p><strong>dag_est</strong>:  numpy.ndarray