title: Create list in Pandas DataFrame and each list will concatenate column values from prior rows
body: <p>I would like to create a pandas data_frame as below. Is there anyway to do it? Thank you</p>
  
  <pre><code>df = pd.DataFrame({'Column 1':['A','B','C'], 
                     'Column 2':[['A'],['A','B'],['A','B','C']]})
  
  
    Column 1   Column 2
  0        A        [A]
  1        B     [A, B]
  2        C  [A, B, C]
  </code></pre>