Examples of using collections.namedtuple and collections.defaultdict, the "factory" collection types

factories.py

"""
Example of using namedtuple:

    >>> from collections import namedtuple
    >>> Point = namedtuple("Point", "x y")
    >>> point = Point(1, 2)
    >>> point
    Point(x=1, y=2)
    >>> point.x
    1
    >>> point.y
    2
    >>> x, y = point
    >>> x, y
    (1, 2)
    >>> point._asdict()
    OrderedDict([('x', 1), ('y', 2)])
    >>> point == Point(**{'x': 1, 'y': 2})
    True

Example of using defaultdict:

    >>> from collections import defaultdict
    >>> counter = defaultdict(int)
    >>> "x" in counter
    False
    >>> counter["x"]
    0
    >>> counter["y"] += 1
    >>> counter["y"]
    1
    >>> grouper = defaultdict(list)
    >>> grouper["x"]
    []
    >>> grouper["y"].append(1)
    >>> grouper["y"]
    [1]
"""

if __name__ == "__main__":
    import doctest
    doctest.testmod()