from random import shuffle

class Card:

    def __init__(self, suit, value):
        self.alllowed = ["Hearts", "Diamonds", "Clubs", "Spades"]
        if suit not in self.alllowed:
            raise ValueError("Wrong suit!")
        else:
            self.suit = suit
            self.value = value

    def __repr__(self):
        return "{} of {}".format(self.value, self.suit)


class Deck:

    def __init__(self):
        self.cards = ["{} of {}".format(x, y) for x in ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"] for y in      ["Hearts", "Diamonds", "Clubs", "Spades"]]

    def __repr__(self):
        return "Deck of {} cards".format(self.count())

    def count(self):
        return len(self.cards)

    def _deal(self, num):
        d_lst = []
        if not self.cards:
            raise ValueError("All cards have been dealt")
        elif num == 1:
            return self.cards.pop()
        else:
            if num > self.count():
                num -= num - self.count()
                for i in range(0, num):
                    d_lst.append(self.cards.pop())
            else:
                for i in range(0, num):
                    d_lst.append(self.cards.pop())
            return d_lst

    def shuffle(self):
        if self.count() == 52:
            shuffle(self.cards)
        else:
            raise ValueError("Only full decks can be shuffled")

    def deal_card(self):
        return self._deal(1)

    def deal_hand(self, num_of_c):
        return self._deal(num_of_c)