self.daemon = True

        filelike = False

        self.bytes = bytes()

        if type(source) in (type(''), bytes, bytearray):  # string-like

            self.bytes = bytes(source)

        else:  # can be either file pointer or file-like

                # converting file descriptor (int) stdin into file-like

                source = os.fdopen(source, 'rb', 16384)

            # let's see if source is file-like by now

            filelike = hasattr(source, 'read')

        if not filelike and not self.bytes:

            raise TypeError("StreamFeeder's source object must be a readable "

        """

        if value is None:

            return None

        if isinstance(value, cls):

            return value

            return cls.get(value)

        if isinstance(value, basestring) and value.isdigit():

            return cls.get(int(value))

        if callback is not None:

            return callback(value)