title: Convert pandas cut operation to a regular string
body: <p>I get the foll. output from a pandas cut operation:</p>
  
  <pre><code>0        (0, 20]
  1        (0, 20]
  2        (0, 20]
  3        (0, 20]
  4        (0, 20]
  5        (0, 20]
  6        (0, 20]
  7        (0, 20]
  8        (0, 20]
  9        (0, 20]
  </code></pre>
  
  <p>How can I convert the (0, 20] to 0 - 20?</p>
  
  <p>I am doing this:</p>
  
  <pre><code>.str.replace('(', '').str.replace(']', '').str.replace(',', ' -')
  </code></pre>
  
  <p>Any better approach?</p>