import json from typing import Any, Dict, List, Union class Record: def __init__( self, id: int, data: str, label: Union[List[Any], Dict[Any, Any]], user: str, metadata: Dict[Any, Any] ): self.id = id self.data = data self.label = label self.user = user self.metadata = metadata def __str__(self): return json.dumps( {"id": self.id, "data": self.data, "label": self.label, "user": self.user, "metadata": self.metadata} )