pickle_ex.py 文件源码

def save(self, filename=None):
        self.check_filename(filename)

        fh = None
        try:
            data = (self.title, self.year, self.duration, self.director_id)
            fh = open(self.filename, 'wb')
            pickle.dump(data, fh)
        except (EnvironmentError, pickle.PicklingError) as err:
            raise SaveError(str(err))
        finally:
            if fh is not None:
                fh.close()