code: def apply_meta(self, arr, funcs):
          
          if arr is None:
              logging.error("unable to convert data: emtpy section")
              return None
  
          tmp = np.copy(arr)
          for col in arr.dtype.names:
              for row in self._get_row_hdrs():
                  meta = self._get_meta(row, col)
                  for mk, mv in sorted(meta.iteritems()):
                      if mk in funcs.iterkeys():
                          tmp[col][self.irt[row]] = \
                              funcs[mk](tmp[col][self.irt[row]], mv)
          return tmp
docs: Apply metadata to help formatting the output:
  
          - conv_funcs: convert data before column alignments
          - deco_funcs: decorate data after column alignments