python3-jaraco.collections (Models and classes suppl. stdlib  module)

Models and classes to supplement the stdlib 'collections' module

Highlights include:

RangeMap:
  A mapping that accepts a range of values for keys.
Projection:
  A subset over an existing mapping.
DictFilter:
  A different implementation of a projection.
KeyTransformingDict:
  Generalized mapping with keys transformed by a function.
FoldedCaseKeyedDict:
  A dict whose string keys are case-insensitive.
BijectiveMap:
  A map where keys map to values and values back to their keys.
ItemsAsAttributes:
  A mapping mix-in exposing items as attributes.
IdentityOverrideMap:
  A map whose keys map by default to themselves unless overridden.
FrozenDict:
  A hashable, immutable map.
Enumeration:
  An object whose keys are enumerated.
Everything:
  A container that contains all things.
Least, Greatest:
  Objects that are always less than or greater than any other.
pop_all:
  Return all items from the mutable sequence and remove them from that
  sequence.
DictStack:
  A stack of dicts, great for sharing scopes.
WeightedLookup:
  A specialized RangeMap for selecting an item by weights.