title: Converting a python object to pandas dataframe
body: <p>I am trying to convert this python object to a pandas dataframe. But it's saying that it's not 1-Dimensional so it cannot convert. It was originally a .mat file that I converted to a python list.
  The list looks like this when printed:</p>
  <pre><code>{'__header__': b'MATLAB 5.0', '__version__': '1.0', '__globals__': [], 'val': array([[-20, -17,  -2, ..., -11,  -4, -11],
  [-12,  -8,  -5, ...,  -9,  -9,  -9]], dtype=int16)}
  
  </code></pre>