class collections.ChainMap(*maps) A ChainMap groups multiple dicts or other mappings together to create a single

copy.copy(x) Return a shallow copy of x.

time.resolution The smallest possible difference between non-equal time objects, timedelta(microseconds=1)

datetime.date() Return date object with same year, month and day.

yeardayscalendar(year, width=3) Return the data for the specified year ready for formatting (similar to yeardatescalendar())

classmethod datetime.utcfromtimestamp(timestamp) Return the UTC datetime corresponding to the POSIX timestamp,

timedelta.min The most negative timedelta object, timedelta(-999999999).

__doc__ The docstring of the module. Defaults to None.

date.year Between MINYEAR and MAXYEAR inclusive.

WeakValueDictionary.valuerefs() Return an iterable of the weak references to the values.