from abc import abstractmethod from dataclasses import field from .artifact import Artifact from .random_utils import random class Collection(Artifact): @abstractmethod def __getitem__(self, key): pass class ListCollection(Collection): items: list = field(default_factory=list) def __getitem__(self, index): return self.items[index] def __len__(self): return len(self.items) def append(self, item): self.items.append(item) def extend(self, other): self.items.extend(other.items) def __add__(self, other): return ListCollection(self.items.__add__(other.items)) class DictCollection(Collection): items: dict = field(default_factory=dict) def __getitem__(self, key): return self.items[key] class ItemPicker(Artifact): item: object = None def __call__(self, collection: Collection): try: return collection[int(self.item)] except (SyntaxError, KeyError, ValueError) as e: # in case picking from a dictionary return collection[self.item] class RandomPicker(Artifact): def __call__(self, collection: Collection): if isinstance(collection, ListCollection): return random.choice(list(collection.items)) elif isinstance(collection, DictCollection): return random.choice(list(collection.items.values()))