def test_shuffle_strength():
ctr = 0
for i in range(30000):
test_deck = Deck()
test_deck.riffle()
test_deck.riffle()
ctr += Deck.shuffle_score(test_deck)
ctr /= float(30000)
print(ctr)
def test_perfect_riffles():
for j in range(53):
x = j
Montevideo = Deck()
for i in range(x):
Montevideo.riffle(perfect=True)
print("%s perfect riffles:" % x)
print(Deck.shuffle_score(Montevideo))
print("\n")