'Initializes a FileClassification instance.
Args:
config: The app.yaml object to check the filename against.
filename: The name of the file.
error_fh: Where to send status and error messages.'

def __init__(self, config, filename, error_fh=sys.stderr):

    self.__error_fh = error_fh
    self.__static_mime_type = self.__GetMimeTypeIfStaticFile(config, filename)
    self.__static_app_readable = self.__GetAppReadableIfStaticFile(config, filename)
    (self.__error_mime_type, self.__error_code) = self.__LookupErrorBlob(config, filename)
