The collections module

When Python general purpose built-in containers (tuple, list, set, and dict) aren't enough, we can find specialized container data types in the collections module. They are:

Data type	Description
namedtuple()	A factory function for creating tuple subclasses with named fields
deque	A list-like container with fast appends and pops on either end
ChainMap	A dict-like class for creating a single view of multiple mappings
Counter	A dict subclass for counting hashable objects
OrderedDict	A dict subclass that remembers the order entries were added
defaultdict	A dict subclass that calls a factory function to supply missing values
UserDict	A wrapper around dictionary objects for easier dict subclassing
UserList	A wrapper around list objects for easier list subclassing
UserString	A wrapper around string objects for easier string subclassing

We don't have the room to cover all of them, but you can find plenty of examples in the official documentation...