title: TypeError: unhashable type: 'slice' for pandas
body: <p>I have a pandas datastructure, which I create like this:</p>
  
  <pre><code>test_inputs = pd.read_csv("../input/test.csv", delimiter=',')
  </code></pre>
  
  <p>Its shape</p>
  
  <pre><code>print(test_inputs.shape)
  </code></pre>
  
  <p>is this</p>
  
  <pre><code>(28000, 784)
  </code></pre>
  
  <p>I would like to print a subset of its rows, like this:</p>
  
  <pre><code>print(test_inputs[100:200, :])
  print(test_inputs[100:200, :].shape)
  </code></pre>
  
  <p>However, I am getting:</p>
  
  <pre><code>TypeError: unhashable type: 'slice'
  </code></pre>
  
  <p>Any idea what could be wrong?</p>