def _load_data(self, data, from_db=False):
self._data = data[:]<EOL>self.setattrs(<EOL>values=[],<EOL>node_stack=[],<EOL>node_dict={},<EOL>)<EOL>self._from_db = from_db<EOL>
Stores the data at self._data, actual object creation done at _generate_instances()

Args:
    data (list): List of dicts.
    from_db (bool): Default False. Is this data coming from DB or not.