reverse() Reverse the elements of the deque in-place and then return None.

class weakref.WeakKeyDictionary([dict]) Mapping class that references keys weakly. Entries in the dictionary will be discarded

class collections.abc.Container class collections.abc.Hashable class collections.abc.Sized

formatmonth(theyear, themonth, withyear=True) Return a month’s calendar as an HTML table. If withyear is true the year

data A real dictionary used to store the contents of the UserDict class.

timezone.utc The UTC timezone, timezone(timedelta(0)).

types.DynamicClassAttribute(fget=None, fset=None, fdel=None, doc=None) Route attribute access on a class to __getattr__.

PrettyPrinter.pformat(object) Return the formatted representation of object. This takes into account the options passed

class collections.abc.ItemsView class collections.abc.KeysView class collections.abc.ValuesView

weakref.proxy(object[, callback]) Return a proxy to object which uses a weak reference. This supports use of the proxy