Gets the keys from given value.

        :param value: Value.
        :type value: object
        :return: Keys.
        :rtype: object

def get_keys_from_value(self, value):
        """
        Gets the keys from given value.

        :param value: Value.
        :type value: object
        :return: Keys.
        :rtype: object
        """

        return [key for key, data in self.iteritems() if data == value]