Why isn't my python pygame code working? -


i'm watching tutorial on youtube thenewboston http://www.youtube.com/watch?v=9ywzfchmz78&feature=share&list=ec8e21bdd0981fdf66 , i'm copying code yet mine isn't working. whenever press down arrow key, whole program freezes , won't let me quit. i'm using python 3.3. please help. here's code.

grey="grey.jpg" circle="circle.png"  import pygame, sys pygame.locals import*  pygame.init() screen=pygame.display.set_mode((1278,990),0,32)  background=pygame.image.load(grey).convert() pic=pygame.image.load(circle).convert()  x,y=0,0 movex,movey=0,0  while true:     event in pygame.event.get():         if event.type == quit:             pygame.quit()             sys.exit()         if event.type==keydown:             if event.key==k_left:                 movex=-1             elif event.key==k_right:                 movex=+1             elif event.key==k_up:                 movey=-1             elif event.key==k_down:                 movey=+1         if event.type==keyup:             if event.key==k_left:                 movex=0             elif event.key==k_right:                 movex=0             elif event.key==k_up:                 movey=0             elif event.key==k_down:                 movey=0     x+=movex     y+=movey      screen.blit(background, (0,0))     screen.blit(pic,(x,y))      pygame.display.update()

quick run of code:

$ python test1.py  traceback (most recent call last):   file "test1.py", line 37, in <module>     elif event.key==k_down: nameerror: name 'k_down' not defined

the error displayed when program crashes on down arrow push.

the crash due typo, have "k_down" when needs "k_down".

corrected code:

grey="grey.jpg" circle="circle.png"  import pygame, sys pygame.locals import*  pygame.init() screen=pygame.display.set_mode((1278,990),0,32)  background=pygame.image.load(grey).convert() pic=pygame.image.load(circle).convert()  x,y=0,0 movex,movey=0,0  while true:     event in pygame.event.get():         if event.type == quit:             pygame.quit()             sys.exit()         if event.type==keydown:             if event.key==k_left:                 movex=-1             elif event.key==k_right:                 movex=+1             elif event.key==k_up:                 movey=-1             elif event.key==k_down:                 movey=+1         if event.type==keyup:             if event.key==k_left:                 movex=0             elif event.key==k_right:                 movex=0             elif event.key==k_up:                 movey=0             elif event.key==k_down:                 movey=0     x+=movex     y+=movey      screen.blit(background, (0,0))     screen.blit(pic,(x,y))      pygame.display.update()

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