code: def set_cols_align(self, array):
          
  
          self._check_row_size(array)
          self._align = array
          return self
docs: Set the desired columns alignment
  
          - the elements of the array should be either "l", "c" or "r":
  
              * "l": column flushed left
              * "c": column centered
              * "r": column flushed right