from random import randint

def roll(number, sides):
    """
    roll a number of virtual dice with a given number of sides
    """
    res = 0
    throws = []
    for die in range(number):
        throws.append(randint(1, sides))
        res += throws[-1]
    print(res, ":", *throws)
    return res


def parselist(path):
    """
    parse a list containing dice rolls (one per line) a la
    5d12
    6d4
    1d2
    1d8
    3d6
    4d20
    100d100
    """
    roll_call = []
    with open(path, 'r') as rolls:
        for line in rolls:
            line = line.strip()
            roll_call.append(line.split('d'))

    return roll_call


if __name__ == '__main__':
    pali = parselist('dice.rolls')
    print(pali)
    for to_roll in pali:
        n, s = to_roll
        print("Rolling", n + "d" + s)
        print("Result:", roll(int(n), int(s)), '\n')

    # interactive mode
    x = 0
    while x != 'x':
        x = input("please input what you want to throw as 'NdM', or 'x' to quit\n")
        if len(x.split('d')) == 2:
                n, m = x.split('d')
                roll(int(n), int(m))