magic_characterizer_mixin.py 文件源码

def _get_and_cache(file_path, supported_formats):
        mime_type = from_file(file_path, mime=True)
        try:
            fmt = supported_formats[mime_type]
            MagicCharacterizerMixin._cache[file_path] = fmt
            return fmt
        except KeyError:
            message = '{0} characterized as {1} format, which is not supported'
            message = message.format(file_path, mime_type)
            raise UnsupportedFormat(message, http_status_code=500)