[pygame] BUG: pygame leaks memory (?)

["Christoph Stahl" <daspfanni2000@xxxxxxx>]

Hello,
 
I use pygame to visualize locally on my computer what otherwise can be viewed on my self build led matrix that is driven by a raspberry pi.
 
When I do not use the local display, but the LED matrix, the memory used by the python process stays flat.
 
But when I use the local pygame display - memory usage is steadily increasing.
 
The whole code is on github: https://github.com/stahlfabrik/RibbaPi
 
Here is an example script, that mimics my code and leaks memory as well. I think the code is leaked by pygame - or my usage of pygame. 

###

#!/usr/bin/env python3

import numpy as np
import pygame
import sys


class Computer():
    def __init__(self, width=16, height=16, margin=5, size=30):
        self.width = width
        self.height = height
        self.margin = margin
        self.size = size

        self.window_size = (width * size + (width + 1) * margin,
                            height * size + (height + 1) * margin)

        pygame.init()
        self.surface = pygame.display.set_mode(self.window_size)
        pygame.display.set_caption("Leak {}x{}".format(width, height))

        self.buffer = np.array([255, 255, 255] * width * height,
                               dtype=np.uint8).reshape(height, width, 3)

    def show(self, gamma=False):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()

        self.surface.fill((0, 0, 0))

        it = np.nditer([self.buffer[:, :, 0],
                        self.buffer[:, :, 1],
                        self.buffer[:, :, 2]], flags=['multi_index'])
        while not it.finished:
            color = (it[0], it[1], it[2])
            (row, column) = it.multi_index
            pygame.draw.rect(self.surface, color,
                             [(self.margin + self.size) * column + self.margin,
                              (self.margin + self.size) * row + self.margin,
                              self.size,
                              self.size])
            it.iternext()

        pygame.display.update()


if __name__ == "__main__":
    import time
    display = Computer()
    while True:
        display.show()
        time.sleep(1/60)
###

OS is mac OS 10.12.2. python3 is from homebrew Python 3.5.2. From pip3 there is numpy==1.11.3 and pygame==1.9.2.

Any hint on what goes wrong here is greatly appreciated! 

Best regards,
Chris