5.3. Abstract Builtin ABC

• from collections.abc import *

• Container

• Hashable

• Iterable

• Iterator

• Reversible

• Generator

• Callable

• Collection

• Sequence

• MutableSequence

• ByteString

• Set

• MutableSet

• Mapping

• MutableMapping

• MappingView

• ItemsView

• KeysView

• ValuesView

• Awaitable

• Coroutine

• AsyncIterator

• AsyncGenerator

Table 5.6. Protocols

Protocol	Methods
Callable	__call__
Container	__contains__
Hashable	__hash__
Reversible	__reversed__
Iterable	__iter__
Iterator	__iter__, __next__
Generator	__iter__, __next__, close, send, throw
Collection	__contains__, __iter__, __len__
Sequence	__contains__, __getitem__, __iter__, __len__, __reversed__, count,``index``
MutableSequence	__contains__, __delitem__, __getitem__, __iadd__, __iter__, __len__, __reversed__, __setitem__, append, count, extend, index, insert, pop, remove, reverse
ByteString	__contains__, __getitem__, __iter__, __len__, __reversed__, count, index
Set	__and__, __contains__, __eq__, __ge__, __gt__, __iter__, __le__, __len__, __lt__, __ne__, __or__, __sub__, __xor__, isdisjoint
MutableSet	__and__, __contains__, __contains__, __eq__, __ge__, __gt__, __iand__, __ior__, __isub__, __iter__, __iter__, __ixor__, __le__, __len__, __len__, __lt__, __ne__, __or__, __sub__, __xor__, add, clear, discard, isdisjoint,``pop``, remove
Mapping	__contains__, __eq__, __getitem__, __iter__, __len__, __ne__, get, items, keys, values
MutableMapping	__contains__, __delitem__, __eq__, __getitem__, __getitem__, __iter__, __iter__, __len__,``__len__``, __ne__, __setitem__, clear, get, items, keys, pop, popitem, setdefault, update, values,
MappingView	__len__
ItemsView	__contains__, __iter__
KeysView	__contains__, __iter__
ValuesView	__contains__, __iter__
Awaitable	__await__
Coroutine	__aiter__, close, send, throw
AsyncIterator	__aiter__, __anext__
AsyncGenerator	__aiter__, __anext__, aclose, asend, athrow

5.3.1. Use Case - 1

>>> data = range(0,3)
>>>
>>>
>>> hasattr(data, '__iter__')
True
>>>
>>> hasattr(data, '__next__')
False

>>> result = iter(data)
>>>
>>>
>>> hasattr(result, '__iter__')
True
>>>
>>> hasattr(result, '__next__')
True

5.3.2. Use Case - 2

>>> result = enumerate(['a', 'b', 'c'])
>>>
>>>
>>> hasattr(result, '__iter__')
True
>>>
>>> hasattr(result, '__next__')
True