Wrapping a collection class

The following is a wrapper design that contains an internal collection:

class Deck:
    def __init__( self ):
        self._cards = [card6(r+1,s) for r in range(13) for s in (Club, Diamond, Heart, Spade)]
        random.shuffle( self._cards )
    def pop( self ):
        return self._cards.pop()

We've defined Deck so that the internal collection is a list object. The pop() method of Deck simply delegates to the wrapped list object.

We can then create a Hand instance with the following kind of code:

d= Deck()
hand= [ d.pop(), d.pop() ]

Generally, a Facade design pattern or wrapper class contains methods that are simply delegated to the underlying implementation class. This delegation can become wordy. For a sophisticated collection, we may wind up delegating a large number of methods to the wrapped object.