title: how to set the index as character for pandas
body: <p>I am trying to create a pandas df like this <a href="https://stackoverflow.com/a/50274029/11074017">post</a>.</p>
  
  <p><a href="https://i.stack.imgur.com/uurUO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uurUO.png" alt="enter image description here"></a></p>
  
  <pre><code>df = pd.DataFrame(np.arange(9).reshape(3,3) , columns=list('123'))
  df
  </code></pre>
  
  <p>this piece of code gives </p>
  
  <p><a href="https://i.stack.imgur.com/gMiSZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gMiSZ.png" alt="enter image description here"></a></p>
  
  <p><code>describe()</code> gives </p>
  
  <p><a href="https://i.stack.imgur.com/lWqVD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lWqVD.png" alt="enter image description here"></a></p>
  
  <p>is there is way to set the name of each row (i.e. the index) in <code>df</code> as 'A', 'B', 'C' instead of '0', '1', '2' ?</p>