betty.collection.mapping package¶

Submodules¶

Mapping types and implementations.

class betty.collection.mapping.MutableResolvedMapping¶

A mutable mapping of resolvable keys and values.

abstractmethod pop(key: KeyT | ResolvableKeyT, /) → ValueT¶
abstractmethod pop(key: KeyT | ResolvableKeyT, /, default: ValueT | ResolvableValueT) → ValueT
abstractmethod pop(key: KeyT | ResolvableKeyT, /, default: T) → ValueT | T: D.pop(k[,d]) -> v, remove specified key and return the corresponding value. If key is not found, d is returned if given, otherwise KeyError is raised.

abstractmethod popitem() → (k, v), remove and return some (key, value) pair¶: as a 2-tuple; but raise KeyError if D is empty.

abstractmethod setdefault(key: KeyT | ResolvableKeyT, default: None = None, /) → T | None¶
abstractmethod setdefault(key: KeyT | ResolvableKeyT, default: ValueT | ResolvableValueT, /) → ValueT: D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D

abstractmethod update(other: Mapping[KeyT | ResolvableKeyT, ValueT | ResolvableValueT] | Iterable[tuple[KeyT | ResolvableKeyT, ValueT | ResolvableValueT]], /, **kwargs: ValueT | ResolvableValueT) → None¶
abstractmethod update(**kwargs: ValueT | ResolvableValueT) → None: D.update([E, ]**F) -> None. Update D from mapping/iterable E and F. If E present and has a .keys() method, does: for k in E.keys(): D[k] = E[k] If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v In either case, this is followed by: for k, v in F.items(): D[k] = v

class betty.collection.mapping.ResolvedMapping¶

A mutable mapping of resolvable keys.

abstractmethod get(key: KeyT | ResolvableKeyT, default: T, /) → ValueT | T¶
abstractmethod get(key: KeyT | ResolvableKeyT, default: None = None, /) → ValueT | None: D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None.