diff options
Diffstat (limited to 'Lib/_collections_abc.py')
| -rw-r--r-- | Lib/_collections_abc.py | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/Lib/_collections_abc.py b/Lib/_collections_abc.py index 077bde4d21..f035970a8e 100644 --- a/Lib/_collections_abc.py +++ b/Lib/_collections_abc.py @@ -11,7 +11,7 @@ import sys __all__ = ["Awaitable", "Coroutine", "AsyncIterable", "AsyncIterator", "Hashable", "Iterable", "Iterator", "Generator", "Reversible", - "Sized", "Container", "Callable", + "Sized", "Container", "Callable", "Collection", "Set", "MutableSet", "Mapping", "MutableMapping", "MappingView", "KeysView", "ItemsView", "ValuesView", @@ -326,6 +326,15 @@ class Container(metaclass=ABCMeta): return _check_methods(C, "__contains__") return NotImplemented +class Collection(Sized, Iterable, Container): + + __slots__ = () + + @classmethod + def __subclasshook__(cls, C): + if cls is Collection: + return _check_methods(C, "__len__", "__iter__", "__contains__") + return NotImplemented class Callable(metaclass=ABCMeta): @@ -345,7 +354,7 @@ class Callable(metaclass=ABCMeta): ### SETS ### -class Set(Sized, Iterable, Container): +class Set(Collection): """A set is a finite, iterable container. @@ -570,7 +579,7 @@ MutableSet.register(set) ### MAPPINGS ### -class Mapping(Sized, Iterable, Container): +class Mapping(Collection): __slots__ = () @@ -794,7 +803,7 @@ MutableMapping.register(dict) ### SEQUENCES ### -class Sequence(Sized, Reversible, Container): +class Sequence(Reversible, Collection): """All the operations on a read-only sequence. |