compression.py 文件源码

def open_compressed_file(filename, mode):
    """Open a compressed file, determining the compression type based on the
    file name.

    Args:
        filename: The file to open.
        mode: The file open mode.

    Returns:
        The opened file.
    """
    ext = os.path.splitext(filename)
    opener = get_file_opener(ext)
    if not opener:
        raise ValueError("{} is not a recognized compression format")
    return opener(filename, mode)