class collections.UserDict([initialdata]) Class that simulates a dictionary. The instance’s contents are kept in a regular dictionary

time.tzinfo The object passed as the tzinfo argument to the time constructor, or None if none was

weakref.getweakrefs(object) Return a list of all weak reference and proxy objects which refer to object.

subtract([iterable-or-mapping]) Elements are subtracted from an iterable or from another mapping (or counter)

popitem(last=True) The popitem() method for ordered dictionaries returns and removes a (key, value) pair. The pairs

exception weakref.ReferenceError Exception raised when a proxy object is used but the underlying object has been collected.

pprint.pformat(object, indent=1, width=80, depth=None, *, compact=False) Return the formatted representation of object

datetime.time() Return time object with same hour, minute, second and microsecond. tzinfo is None

class collections.abc.KeysView class collections.abc.ValuesView ABCs for mapping, items, keys, and values

bisect.bisect_right(a, x, lo=0, hi=len(a)) bisect.bisect(a, x, lo=0, hi=len(a)) Similar to bisect_left()