Well this is not the way I would code it. In fact the way I did it was to create a die class that did everything a single die should do. Then I put that class in a DiceBox or DiceSet class that would create how many dice you want. the way you have done it is going to make it difficult to get results or lock dice if you need to so they don't roll. With that said I was write there was really only one line that was wrong in your code. You are returning a list of die or in this case a list of 1 die so you have to access it as you would a list. The line you need to change is. score += int(cast) It will work if you do score +=cast[0] Then if you later change the amount of die your rolling to lets say 6 then you could do something like for i in range (0 ,7): score+=cast[i] To get the total. Ken Ken _____ From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of BlueScale Sent: Sunday, October 19, 2008 8:37 AM To: programmingblind@xxxxxxxxxxxxx Subject: RE: Python lists and Math Hi, I didn't get it to work. Classes and OO in general have always given me problems. After working with Python a little, I have gotten somewhat better but not much. I did this in two files to get some practise with import. Import works fine, but I may have gone about the class thing completely wrong. My code has changed slightly from what I posted earlier. So, here's my code for each file: #dice.py class dice: def __init__(self,numDice): self.numDice = numDice def roll(self): import random die = [] x = 0 while x < self.numDice: die.append(random.randint(1,6)) x += 1 return die #dice-test.py #!/usr/bin/python import dice score = 0 roll = dice.dice(1) cast = roll.roll() score += int(cast) print score On Sun, 2008-10-19 at 08:15 -0500, Ken Perry wrote: You didn't exactly send enough of the code for someone to answer this if they had not ran into the problem. I actually just wrote a dice class recently for a project I am working on. I am betting because of the error message you got the roll is a list if this is the case its probably a list of your dice so what you should have had was score=roll[i].roll(6) i being the number of the die you want to roll for example if you have a list of 5 dice for a game like Yahtzee you could do something like for i in range (0,5): score+=roll[i].roll(6) If you can't get it to work let me know I can take your code and fix it probably in a bout 2 minutes or less. Ken y _____ From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of BlueScale Sent: Sunday, October 19, 2008 7:40 AM To: programmingblind@xxxxxxxxxxxxx Subject: Python lists and Math Hi, In my effort to learn Python, I have written a dice class. I have a roll method that accepts one argument, the number of dice to roll. It returns a list of the results. In the program I wrote to test the class, I have something like: score = roll.roll(1) This rolls 1 six sided die. The problem I run in to is when I try to do: score += roll.roll(1) I get an error about the += operand not supporting list and int. So my next move was to try: score += int(roll.roll()) Which Python says can't be done because the number is stored in a list, not a string. So, my question is, how do I keep track of the score? IS there some function to convert lists to int? Thanks for the help