Working Craps program

How can I make this better?

import random

def roll():
    input("Press Enter to roll")
    dice = random.randint(1, 6) + random.randint(1, 6)
    print("You rolled a {}" .format(dice))
    return dice

def checkRoll(dice):
    if dice == 7 or dice == 11:
        print("You win")
        playAgain()
    elif dice == 2 or dice == 3 or dice == 12:
        print("You lose")
        playAgain()
    else:
        print("Time to try to roll the point")
        reRoll(dice)

def reRoll(point):
    dice = roll()
    if dice == point:
        print("You win")
        playAgain()
    elif dice == 7:
        print("You lose")
        playAgain()
    else:
        reRoll(point)
def play():
    print("Do you wanna play Craps? Y/n ")
    response = input(">>> ").lower()
    if response == "y":
        checkRoll(roll())
    else:
        input("ENTER to quit")

def playAgain():
    response = input("Play Again? Y/n >>>").lower()
    if response == "y":
        checkRoll(roll())
    else:
        input("ENTER to quit")

play()

PEP8

1.Python uses underscore as naming separator in function and variable names, see PEP8

2.Two blank lines are used to separate function/classes

Improvements.

To make your module reusable you should use if __name__ == '__main__' condtion before invoking your main function.

So instead of calling play() you should do:

if __name__ == '__main__':
    play()

Your play_again and play function got difference only in print statements, so you can just combine them into a single function.

def start_game(first_run=False):
    if first_run:
        print("Do you wanna play Craps? Y/n ")
        response = input(">>> ").lower()
    else:
        response = input("Play Again? Y/n >>>").lower()
    if response == "y":
        check_roll(roll())
    else:
        input("ENTER to quit")

Note

I've renamed function into start_game since I find play a bit confusing. But you can keep your name if you want.

Now if you look at your check_roll and reroll function they are also the same except for win and lose conditions, so you can also combine them into a single one like this:

def check_roll(dice, win_conditions=(7, 11), lose_conditions=(2, 3, 12)):
    if dice in win_conditions:
        print("You win")
        start_game()
    elif dice in lose_conditions:
        print("You lose")
        start_game()
    else:
        print("Time to try to roll the point")
        check_roll(roll(), (dice,), (7,))

Also, I did small improvement to roll() function so now you can see values of dice you've rolled:

def roll():
    input("Press Enter to roll")
    dice = random.randint(1, 6), random.randint(1, 6)
    print("You rolled a {}" .format(dice))
    return sum(dice)

So in the end, what we have is this:

import random

def roll():
    input("Press Enter to roll")
    dice = random.randint(1, 6), random.randint(1, 6)
    print("You rolled a {}" .format(dice))
    return sum(dice)

def check_roll(dice, win_conditions=(7, 11), lose_conditions=(2, 3, 12)):
    if dice in win_conditions:
        print("You win")
        start_game()
    elif dice in lose_conditions:
        print("You lose")
        start_game()
    else:
        print("Time to try to roll the point")
        check_roll(roll(), (dice,), (7,))

def start_game(first_run=False):
    if first_run:
        print("Do you wanna play Craps? Y/n ")
        response = input(">>> ")
    else:
        response = input("Play Again? Y/n >>>")
    if response.lower() == "y":
        check_roll(roll())
    else:
        input("ENTER to quit")

if __name__ == '__main__':
    start_game(True)

StackExchange Code Review Q#149606, answer score: 3