Python models and classes to supplement the stdlib ‘collections’

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.
  • 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.


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