Re: [pygame] Doubt about using methods in python

["David Gowers" <00ai99@xxxxxxxxx>]

Hi marta,

On Nov 15, 2007 9:11 PM, marta sanz <p22sacam@xxxxxx> wrote:
> Hi,
>
> I have a doubt about python and I would like to ask it to you.
> It is about the use of functions -methos- of a class within other class. I
> have 2 classes in 2 separate files, in file squares.py I have the class
> Square with the methods getRect() and setRect().
>
> Now, in other file, board.py, I have the class Board that has an object
> outskirt= Square(), can anyone tell me how do I have to use the method
> setRect ?
>
> The code is the following:
>
> File squares.py
> class Square:
>
> def setRect(self, x,y,width,height):
>  self.rect= pygame.rect(x,y,width, height)
>
>
> File board.py
>
> from squares import Square
> import squares
>
> class Board :
>
> for i in range(42):
>  self.outskirt.append(squares.Square(self))

The above 2 lines are nonsensical, mainly because self only exists
inside methods (and then only if you follow the convention of naming
the first argument 'self'). using self outside of methods will not
give the desired result -- in fact it'll give an error that self
doesn't exist.

What you probably want to do, is, each time a Board is created,
initialize self.outskirt with those 42 squares. This is far closer to
achieving what you want:

class Board:
  def __init__ (self):
   self.outskirt = [] # remember to create the list before appending to it :)
   for i in range(42):
     self.outskirt.append(squares.Square(self)) # you are calling
Square with a Board as the first argument -- is this your intent?



>
>
> def squareConfiguration (self):
> ...
>  for j in range(len(self.outskirt)):
>
> #and now is when I don't know which I have to use to do it OK :
>  self.outskirt[j].rect= pygame.rect ( x, y, w, h)
>  self.outskirt[j].setRect( x, y, w, h)
>  Square.setRect( self.outskirt[j], x, y, w, h)
>

The following is probably more correct for what you want:

def squareConfiguration (self):
...
  for sq in self.outskirt: # iterate through the items in
self.outskirt rather than their indices.
    sq.setRect (x,y,w,h) # where are x,y,w,h coming from? are they
calculated earlier in the function? ???

I'll leave it to you to figure out why.

> I haven't proved them because I'm quite lost using python...
> Thanks and sorry for my English..

Have you looked at http://wiki.python.org/moin/Languages ? You might
be able to find what you need to know written in your native language.