title: Remove Index and columns on pandas dataframe
body: <p>I have this list:</p>
  
  <pre><code>import pandas as pd
  l = [[1,2,3],[4,5,6],[7,8,9]]
  New_dataframe = pd.DataFrame(l)
  print(New_dataframe)
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>   0  1  2
  0  1  2  3
  1  4  5  6
  2  7  8  9
  </code></pre>
  
  <p>I want to remove those indexed rows and columns. How to achieve that??DataFrame I would like to see is this:</p>
  
  <pre><code>1  2  3
  4  5  6
  7  8  9
  </code></pre>
  
  <p>How to remove that index column and rows??</p>