title: openpyxl: Iterate through all the rows and get the row data in a tuple
body: <p>How do I iterate through all the rows in an xls sheet, and get each row data in a tuple. So at the end of the iteration, I should have a list of tuples with each element in the list, being a tuple of row data.
  For instance: This is the content of my spreadsheet:</p>
  
  <p><code>testcase_ID         input_request        request_change
   test_1A             test/request_1       YES
   test_2A             test/request_2       NO
   test_3A             test/request_3       YES
   test_4A             test/request_4       YES</code></p>
  
  <p>my final list should be:
  [(test_1A, test/request_1, YES), 
   (test_2A, test/request_2, NO), 
   (test_3A, test/request_3, YES), 
   (test_4A, test/request_4, YES)]</p>
  
  <p>How can I do this in openpyxl?</p>