Python data file with pickle.

datafile.py

class DataFile:
    """Handle a data file using pickle.
    """

    def __init__(self, filepath, init_data={}):
        """Initialize or load a pickled data file. 
        """

        self.__filepath = filepath
        self.data = init_data

        try:
            fp = open(self.__filepath, "rb")
        except FileNotFoundError:
            fp = open(self.__filepath, "wb")
        else:
            try:
                self.data = pickle.load(fp)
            except EOFError:
                pass
        fp.close()

    def save(self):
        """Save changes to disk.
        """

        with open(self.__filepath, "wb") as fp:
            pickle.dump(self.data, fp)