title: How to get the number of unique array elements in N-dimensional np array?
body: <p>I have a 2D np array containing str values. I would like to get a count of the unique arrays (rows) that make up this 2D array.</p>
  <p>This would be the example input:</p>
  <pre><code>array([[A, B, C],
         [A, B, C],
         [C, E, F],
         [F, J, K]])
  </code></pre>
  <p>I would like to be able to get the unique counts of each of those rows:</p>
  <pre><code>[A, B, C] -&gt; 2
  [C, E, F] -&gt; 1
  [F, J, K] -&gt; 1
  </code></pre>
  <p>Thank you.</p>