code: def set_cols_width(self, array):
          
  
          self._check_row_size(array)
          try:
              array = map(int, array)
              if reduce(min, array) <= 0:
                  raise ValueError
          except ValueError:
              sys.stderr.write("Wrong argument in column width specification\n")
              raise
          self._width = array
docs: Set the desired columns width
  
          - the elements of the array should be integers, specifying the
            width of each column. For example:
  
                  [10, 20, 5]