python raising an error exception

Question

I am working on an othello game for class and am trying to raise an exception when the player makes a valid move but this exception is making my program crash and im not sure why. I get the error:

Traceback (most recent call last): File "C:\Users\chapp_000\Desktop\Othello\OthelloUI.py", line 46, in <module> s.makeMove(move[0],move[-1]) File "C:\Users\chapp_000\Desktop\Othello\OthelloGL.py", line 73, in makeMove raise InvalidMoveError() OthelloGL.InvalidMoveError

Here is my exception class:

class InvalidMoveError(Exception): '''for handling bad moves''' pass

And here is where the exception is being raised:

if self.checkCell(r,c) == 0: if self.turn ==1: self.board[r][c] = 2 self.turn =2 else: self.board[r][c] = 1 self.turn =1 elif self.checkCell(r,c) !=0: raise InvalidMoveError()

EDIT: to answer some comments I am tying to us my exception to stop my program from crashing by saying pass and check cell looks on my board and returns 0 if no piece is their and 1 or 2 if that player has a piece their line 46 of the code is s.makeMove(move[0],move[-1]) where s is a game bored object and move is a list of 2 numbers from the player saying the x and y location they would like to move to

Mention the details of all the functions you're using such as checkCell — sgp
– sgp, Commented May 27, 2015 at 8:35
This is the expected behavior when raising an exception. What do you actually want to do? — Leon
– Leon, Commented May 27, 2015 at 8:36
line 73 is my raise InvalidMoveError() line and line 46 is where I call the function it's in (not posted because I didn't think the call was a relevant piece of code to the problem and I didn't want to make people read to much code I will edit in more details — Alex Chapp
– Alex Chapp, Commented May 27, 2015 at 8:37

poke · Accepted Answer · 2015-05-27 08:48:29Z

You need to call your method like this if you want to catch the exception and do something with it:

try: s.makeMove(move[0], move[-1]) except InvalidMoveError: print('You made an invalid move') # do something else instead

Otherwise, exceptions that are not handled will cause your program to terminate. That’s the point.

Thank you :) I was a bit confused on the concept of when to call try and catch because im writing my program in separate modules and classes

Collectives™ on Stack Overflow

python raising an error exception

1 Answer 1

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Related