Recursive JSON parsing

JSONparse.py

    def contains(self, element, list_wrap=False):
        """
        Recursively seeks for requested keyword or list of keywords
        :param data: json-type dict
        :param element: str or list
        :return: list or None
        """
        collected_elements = []

        def _recursively_seek(data):
            if isinstance(data, dict):
                for key, value in data.items():
                    if key in element:
                        if isinstance(value, list):
                            for item in value:
                                collected_elements.append(item)
                        elif value is None:
                            collected_elements.append(key)
                        else:
                            collected_elements.append(value)
                    _recursively_seek(value)
            elif isinstance(data, list):
                    for item in data:
                        _recursively_seek(item)
            elif isinstance(data, tuple):
                _recursively_seek(dict(data))

        _recursively_seek(self._data)
        if len(collected_elements) == 0:
            return None
        elif len(collected_elements) == 1:
            if list_wrap:
                return collected_elements
            return collected_elements[0]
        return collected_elements