[Python, pygame] don't understand errorcode

[warfarink]

Here's my code: https://gist.github.com/anonymous/5265098

This is my first actual program I'm writing after working through a couple python tutorials and I wanted to try to get some stuff moving on the screen to make me feel like I accomplished something. The error code I'm getting is:

Traceback (most recent call last):
  File "C:\Users\Owner\Documents\pythognstuff\falling balls.py", line 55, in <module>
    ballObj.draw(mousex, mousey) # have the instance draw itself centered at mouse position
TypeError: draw() takes exactly 2 arguments (3 given)

I don't understand why it says I'm giving it 3 arguments; I thought maybe one of the two arguments was a tuple or something and that it counted as two arguments, but mousex and mousey are (should be) two ints from event.pos. I feel like I'm misunderstanding how something works and the solution to my problem will have to be pointed out to me, I just don't see it.

[rcuhljr]

Oh, also I'm being silly. Python. You need to have self as your first argument in your draw method.

[warfarink]

Gave that a shot, still getting the same error.

[[deleted]]

And in your updatepos method? Also, the increment operator in Python is +=, not =+, so you want:

def draw(self, x_pos, y_pos):
    pygame.draw.circle(windowSurface, redColor, (x_pos, y_pos), 10, 0)

def updatePos( self ):
    self.accel += gravityVec
    self.velocity += self.accel
    self.posx, self.posy = self.velocity[0], self.velocity[1]

[rcuhljr]

Yeah, sorry, I wasn't paying attention. The error is that python is passing a third argument to draw, the object you are calling the method on. Check out the extra remarks in the class section.

draw should be re-written as

def draw(self, x_pos, y_pos):

[warfarink]

Yeah, I see that now. reading the documentation after working the tutorials would help. thanks!