Dice Game 1001

# There are two players John and Mary.
# Each of them has 5 normal dice with 6 sides and beginning with 1001 points.
# Game works on rounds. First playing Mary, after then John.
# Every time when player draw his dice, from his start points extracts dice result and print them.
# The Game Wins player which total points is exactly 0.
# If some round player points has negative value, on next round this player must adding (not extract) dice result to his points.

from random import randint

def draw_dice(dice_sides, number_dice):
    draw_result = 0
    for dice in range(number_dice):
        draw_result += randint(1, dice_sides)

    return draw_result

mary_points = 1001
john_points = 1001
is_mary_turn = True

while True:
    if is_mary_turn and (mary_points == 0 or john_points == 0):
        if mary_points == 0:
            print("\nMary Wins!")
        else:
            print("\nJohn Wins!")
        break

    dice_result = draw_dice(6, 5)
    if is_mary_turn:
        print('Mary draw {0}' .format(dice_result))

        if mary_points > 0:
            mary_points -= dice_result
        else:
            mary_points += dice_result

        print('Mary now have {0} points.' .format(mary_points))

    else:
        print('John draw {0}' .format(dice_result))

        if john_points > 0:
            john_points -= dice_result
        else:
            john_points += dice_result

        print('John now have {0} points.' .format(john_points))

    is_mary_turn = not is_mary_turn