class FileOnBlockDevice: def __init__(self, path): self.__path = path self.__dev = BlockDevice(path) def exists(self): if self.__dev.is_valid(): return True return False def create_empty(self): self.__dev.format_device() self.__dev.write('') def copy_from(self, dest_file): self.__dev.write_from_file(dest_file) def read(self): return self.__dev.read()