Stuff for playing cards

cards.py

from random import choice

class Deck:
    """Card deck"""
    def __init__(self, deck=None):
        """Initializes the default deck, or use whatever list is given"""
        self._deck = deck or [str((["Ace"]+list(range(2,11))+["Jack","Queen","King"])[i-1])+" of "+s+"s" for s in ["Spade","Heart","Club","Diamond"] for i in range(1,14)]
    def output(self):
        """Return copy of internal list"""
        return list(self._deck)
    def dict_output(self):
        """Return internal list as a {value,suit} list"""
        return [{"value":i[:i.find(" ")], "suit":i[i[::-1].find(" ")*-1:]} for i in self._deck]
    def shuffle(self, ret=None):
        """Emulate a bridge shuffle of internal deck, call with value to return deck"""
        retval = []
        half = [self._deck[:int(len(self._deck)/2)],self._deck[int(len(self._deck)/2):]]
        lastval = 0
        last = [[1,1,0], [1,0,0]]
        while len(half[0]) > 0 and len(half[1]) > 0:
            lastval = choice(last[lastval])
            retval.append(half[lastval].pop(0))
        if len(half[0]) > 0:
            retval.extend(half[0])
        elif len(half[1]) > 0:
            retval.extend(half[1])
        else:
            return False
        self._deck = retval
        return ret and list(retval)