def at(self, root):
leafs = root.strip("<STR_LIT:U+0020>").split('<STR_LIT:.>')<EOL>for leaf in leafs:<EOL><INDENT>if leaf:<EOL><INDENT>self._json_data = self.__get_value_from_data(leaf, self._json_data)<EOL><DEDENT><DEDENT>return self<EOL>
Set root where PyJsonq start to prepare

        :@param root
        :@type root: string

        :@return self
        :@throws KeyError