python - Why does this pygame program freeze? -

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below program using pygame updates histogram values change.

however after few seconds of running, program freezes. can point out error?

import random import pygame  screen_size = screen_width, screen_height = 800, 600 frame_rate = 50 background_color = pygame.color("white") bar_color = pygame.color("black") bucket_cnt = 20  pygame.init()  screen = pygame.display.set_mode(screen_size) screen.fill(background_color)  buckets = bucket_cnt*[0] bar_w = screen_width / bucket_cnt  clock = pygame.time.clock() background = pygame.surface(screen.get_size()) background.fill(background_color)  while true:     clock.tick(frame_rate)     random.seed()     idx = random.randrange(bucket_cnt)     buckets[idx] += 1      # create rectangles representing bars in histogram.     bars = [pygame.rect(i*bar_w,                         screen_height - buckets[i],                         bar_w, buckets[i]) in range(bucket_cnt)]      # draw bars on background     [pygame.draw.rect(background, bar_color, b, 5) b in bars]      # blit background     screen.blit(background, (0, 0))      # show "stuff" on screen     pygame.display.flip()

edit

these suggestions. i've changed code using follow them, code still freezes. here how code looks now:

import random import pygame  screen_size = screen_width, screen_height = 800, 600 frame_rate = 50 background_color = pygame.color("white") bar_color = pygame.color("black") bucket_cnt = 20 growth_rate = 10  pygame.init()  screen = pygame.display.set_mode(screen_size) screen.fill(background_color)  buckets = bucket_cnt*[0] bar_w = screen_width / bucket_cnt  clock = pygame.time.clock() background = pygame.surface(screen.get_size()) background.fill(background_color)  # create rectangles representing bars in histogram. bars = [pygame.rect(i*bar_w,                     screen_height - buckets[i],                     bar_w, buckets[i]) in range(bucket_cnt)] random.seed() while true:     clock.tick(frame_rate)     idx = random.randrange(bucket_cnt)     buckets[idx] += 1      bars[idx].inflate_ip(0, growth_rate)      # draw bars on background     pygame.draw.rect(background, bar_color, bars[idx])      # blit background     screen.blit(background, (0, 0))      # show "stuff" on screen     pygame.display.flip()

i want apologize taking everybody's time. turns out there no issue code. work machine overloaded various processes. running multi-threaded test , virtual machine (which compiling large code base). explains why program freezing. thank djmcmayhem trying out code. special shout out alex van leiw. learned few new things pygame today.


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