from typing import Dict
from typing import List
from typing import Optional
from typing import TypeVar

KT = TypeVar("KT")
VT = TypeVar("VT")


def setcover(candidate_sets_dict: Dict[KT, List[VT]],
             items: Optional[VT] = None,
             set_weights: Optional[Dict[KT, float]] = None,
             item_values: Optional[Dict[VT, float]] = None,
             max_weight: Optional[float] = None,
             algo: str = 'approx') -> Dict:
    ...
