52 consecutive cards

from random import shuffle

# Function 0 - Create a cards deck
def createCards():
    cards = list()
    for i in range(1, 14):
        for j in range(4):
            cards.append(i)
    return cards


# Function 1 - Decide how many times I will shuffle the deck
def SHUFFLE(cards, n):
    for i in range(n):
        shuffle(cards)
    return cards


# Function 2 - Decide if there are any  consecutive cards
def consecutive(cards):
    flag = True
    index = -1000
    for i in range(len(cards) - 1):
        if cards[i] == cards[i+1]:
            flag = False
            index = i
            break
    return flag, index


# Function 3 - Simulate rounds with a given n = how many shuffles
def simulate(LIMIT, n):
    good = 0
    for round in range(1, LIMIT+1):
        cards = createCards()
        cards = SHUFFLE(cards, n)
        flag, index = consecutive(cards)
        if flag == True:
            good += 1
    return good



# MAIN FUNCTION
LIMIT = 10**4
nList = list(range(1, 5))
for n in nList:
    good = simulate(LIMIT, n)
    percentage100 = 100 * good / LIMIT
    print(str(n) + " shuffles ---> " + str(good) + " successes ---> " + str(percentage100) + "%")