Python Memory Leak

I have an array of 'cell' objects created like so: class Cell: def __init__(self, index, type, color): self.index = index self.type = type self.score = 0 self.x =

Solution 1:

There appears to be a bug in PixelArray.

The following code replicates the memory leak by setting a single pixel each loop, and you don't even have to update the display to cause the problem:

import pygame, sys
from pygame.localsimport *
ScreenWidth, ScreenHeight = 640, 480
pygame.init()
Display = pygame.display.set_mode((ScreenWidth,ScreenHeight), 0, 32)
pygame.display.set_caption('Memory Leak Test')
whileTrue:
    PixelArray = pygame.PixelArray(Display)
    PixelArray[ScreenWidth-1][ScreenHeight-1] = (255,255,255)
    del PixelArray
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
#pygame.display.update()

If you can handle the performance hit, replacing direct pixel setting with (very short) lines avoids the memory leak, ie: pygame.draw.line(Display, Colour, (X,Y), (X,Y), 1)

Solution 2:

The Cell class can be tighted-up (memorysize) by using slots. That ought to substantially reduce memory consumption:

classCell(object):
    __slots__ = ('index', 'type', 'color')
    ...

The only large structure in your code is pixArr. You might want to monitor its size with sys.getsizeof. Another tool for tracking down leaks is to pretty print gc.garbage.