#randomly generates a number between 1 and 6
import random

#randomly generates two dice rolls
def roll_dice():
    first_dice = random.randrange(1,7) #first roll
    second_dice = random.randrange(1,7) #second roll
    return first_dice,second_dice

wins = {}
losses = {}

#runs the number of games of craps as defined by the parameter and adding the wins and losses to their respective dictionaries
def play_craps(number_of_games):
    dice_sum = sum(roll_dice())
    num_rolls_per_game = 0
    num_games = number_of_games
    games_won_sums = []
    games_lost_sums = []

    #initializes a placeholder "0" for all 21 keys in both wins and losses dictionaries
    for i in range(1,22):
        wins[i] = 0
        losses[i] = 0

    for j in range(1,number_of_games):
        num_games += 1
        point = dice_sum

        for i in range(1,num_rolls_per_game+1):

            if (dice_sum == 7 or dice_sum == 11) and num_rolls_per_game == 0:
                num_rolls_per_game += 1
                num_games += 1
                games_won_sums.append(dice_sum)

            elif (dice_sum == 2 or dice_sum == 3 or dice_sum == 12) and num_rolls_per_game == 0:
                num_rolls_per_game += 1
                num_games += 1
                games_lost_sums.append(dice_sum)

            else:
                num_rolls_per_game += 1
                if dice_sum == 7:
                    games_lost_sums.append(dice_sum)
                    losses[num_rolls_per_game] += 1
                if point == dice_sum:
                    games_won_sums.append(dice_sum)
                    wins[num_rolls_per_game] += 1