Method xzopen

Lib/tarfile.py:2020–2045

Open lzma compressed tar archive name for reading or writing. Appending is not allowed.

(cls, name, mode="r", fileobj=None, preset=None, **kwargs)

    @classmethod
    def xzopen(cls, name, mode="r", fileobj=None, preset=None, **kwargs):
        """Open lzma compressed tar archive name for reading or writing.
           Appending is not allowed.
        """
        if mode not in ("r", "w", "x"):
            raise ValueError("mode must be 'r', 'w' or 'x'")

        try:
            from lzma import LZMAFile, LZMAError
        except ImportError:
            raise CompressionError("lzma module is not available") from None

        fileobj = LZMAFile(fileobj or name, mode, preset=preset)

        try:
            t = cls.taropen(name, mode, fileobj, **kwargs)
        except (LZMAError, EOFError) as e:
            fileobj.close()
            if mode == 'r':
                raise ReadError("not an lzma file") from e
            raise
        except:
            fileobj.close()
            raise
        t._extfileobj = False
        return t

    @classmethod
    def zstopen(cls, name, mode="r", fileobj=None, level=None, options=None,