title: unexpected output arising while iterating over a dataframe
body: <p>i have loaded a csv file as a dataframe using pandas. it has the headers as follows: </p>
  
  <p>account_key
  status
  join_date
  cancel_date
  days_to_cancel
  is_udacity
  is_canceled</p>
  
  <p>under these headers, values are stored in the dataframe.</p>
  
  <p>i am iterating a for-loop over the dataframe(named enrollment) to print out the data row by row</p>
  
  <pre><code>for i in enrollments:
      print(i)
  </code></pre>
  
  <p>the above code should print out the values row by row. however the only output i'm getting is:</p>
  
  <pre><code>account_key
  status
  join_date
  cancel_date
  days_to_cancel
  is_udacity
  is_canceled
  </code></pre>
  
  <p>why is this happening? i am using jupyter notebook on windows</p>