.readLine() method is, however, an
abstract method, to be supplied by a derived class that
knows the format of the line.
# - - - B a s e S t a t i o n S e t . r e a d L i n e - - def readLine(self, scan): '''Process one line from the stations file. [ scan is a Scan object -> if the line in scan is not a valid station line -> scan := scan advanced not beyond end of line raise IOError else if the line in scan contains a location code not in self.locCodeMap -> scan := scan advanced to end of line self.locCodeMap +:= a new entry whose key is that location code, uppercase, and whose value is a new Location containing the station from that line else if the line in scan contains a location code that is in self.locCodeMap -> scan := scan advanced to end of line corresponding value +:= the station from that line ] ''' raise NotImplementedError
When writing a concrete method to replace this one,
you'll probably want to look at Section 8.5, “
BaseStationSet.addStation(): Add a