tarfile.py 文件源码

def close(self):
        """Close the TarFile. In write-mode, two finishing zero blocks are
           appended to the archive.
        """
        if self.closed:
            return

        self.closed = True
        try:
            if self.mode in ("a", "w", "x"):
                self.fileobj.write(NUL * (BLOCKSIZE * 2))
                self.offset += (BLOCKSIZE * 2)
                # fill up the end with zero-blocks
                # (like option -b20 for tar does)
                blocks, remainder = divmod(self.offset, RECORDSIZE)
                if remainder > 0:
                    self.fileobj.write(NUL * (RECORDSIZE - remainder))
        finally:
            if not self._extfileobj:
                self.fileobj.close()