betty.collections.mapping.adapter module¶

Adapters between Betty and Python mappings.

class betty.collections.mapping.adapter.MutableResolvedMappingAdapter¶

Decorate another mapping to resolve any values before proxying them.

__init__(proxied: MutableMapping[KeyT, ValueT], *, key_resolver: Callable[[KeyT | ResolvableKeyT], KeyT] = <function passthrough>, value_resolver: Callable[[ValueT | ResolvableValueT], ValueT] = <function passthrough>)¶

pop(key: KeyT | ResolvableKeyT, /) → ValueT¶
pop(key: KeyT | ResolvableKeyT, /, default: ValueT | ResolvableValueT) → ValueT
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.

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

setdefault(key: KeyT | ResolvableKeyT, default: None = None, /) → T | None¶
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

update(**kwargs: ValueT | ResolvableValueT) → None

Update the mapping with the provided values.

See collections.abc.MutableMapping.update().

class betty.collections.mapping.adapter.ResolvedMappingAdapter¶

Decorate another mapping to resolve any values before proxying them.

__init__(proxied: Mapping[KeyT, ValueT], *, key_resolver: Callable[[KeyT | ResolvableKeyT], KeyT] = <function passthrough>)¶

get(key: KeyT | ResolvableKeyT, default: T, /) → ValueT | T¶
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.