title: TypeError: can't convert np.ndarray of type numpy.object_
body: <p>How to convert a numpy array of <code>dtype=object</code> to torch <code>Tensor</code>?</p>
  <pre><code>array([
     array([0.5, 1.0, 2.0], dtype=float16),
     array([4.0, 6.0, 8.0], dtype=float16)
  ], dtype=object)
  </code></pre>