@classmethod
def taropen(cls, name, mode='r', fileobj=None, **kwargs):
    """Open uncompressed tar archive name for reading or writing.
        """
    if len(mode) > 1 or mode not in 'raw':
        raise ValueError("mode must be 'r', 'a' or 'w'")
    return cls(name, mode, fileobj, **kwargs)
