code: def create_subfield_layer(aspect, ip):
      '''Reads the SUBFIELD.pgn file and creates
      the subfield layer.'''
      layer = []
      if 'PANTS' in aspect:
          layer = pgnreader.parse_pagan_file(FILE_SUBFIELD, ip, invert=False, sym=True)
      else:
          layer = pgnreader.parse_pagan_file(FILE_MIN_SUBFIELD, ip, invert=False, sym=True)
  
      return layef create_subfield_layer(aspect, ip):
      '''Reads the SUBFIELD.pgn file and creates
      the subfield layer.'''
      layer = []
      if 'PANTS' in aspect:
          layer = pgnreader.parse_pagan_file(FILE_SUBFIELD, ip, invert=False, sym=True)
      else:
          layer = pgnreader.parse_pagan_file(FILE_MIN_SUBFIELD, ip, invert=False, sym=True)
  
      return layer
docs: Reads the SUBFIELD.pgn file and creates
      the subfield layer.