Styjun

I'm coding a game in python 3 (with pygame) for a school project, but i'm struggeling with something:
I'm trying to get my sprite to have an animation when moving, but it only shows a static image:
when i press the left key, the sprite's image changes to a static image instead of an animation made of 3 png's.
Here is that part of the code:

clock = pygame.time.Clock()

walkRight = [pygame.image.load('ressources/images/R1.png'), pygame.image.load('ressources/images/R2.png'), pygame.image.load('ressources/images/R3.png')]
walkLeft = [pygame.image.load('ressources/images/L1.png'), pygame.image.load('ressources/images/L2.png'), pygame.image.load('ressources/images/L3.png')]
walkUp = [pygame.image.load('ressources/images/U1.png'), pygame.image.load('ressources/images/U2.png'), pygame.image.load('ressources/images/U3.png')]
walkDown = [pygame.image.load('ressources/images/D1.png'), pygame.image.load('ressources/images/D2.png'), pygame.image.load('ressources/images/D3.png')]


#this is the player sprite

class Player(pygame.sprite.Sprite):
 def __init__(self):
 pygame.sprite.Sprite.__init__(self)
 self.image = (walkDown[4//3])
 self.rect = self.image.get_rect()
 self.rect.centerx = width / 2
 self.rect.bottom = height / 2
 self.speedx = 0
 self.speedy = 0
 self.velocity = 2


 def update(self):
 self.speedx = 0
 self.speedy = 0
 left = False
 right = False
 up = False
 down = False
 run = False 
 walkCount = 4
 runCount = 4 
 clock.tick(FPS)
 keys = pygame.key.get_pressed()

#I believe this is the part that has something wrong!
 if walkCount + 1 >= 9:
 walkCount = 0
 if (down == True and run == False):
 walkCount += 1
 self.image = (walkDown[walkCount//3]) 
 elif (up == True and run == False):
 walkCount += 1
 self.image = (walkUp[walkCount//3])
 elif (right == True and run == False):
 walkCount += 1
 self.image = (walkRight[walkCount//3])
 elif (left == True and run == False):
 walkCount += 1
 self.image = (walkLeft[walkCount//3])

walkCount is a local variable in the method update. It is initialized by 4 every time when update is called. So the value of walkCount is the same at the start of the function, every time. This causes that the image seems to be static.
walkCount has to be an attribute of the class Player rather than a local variable:

class Player(pygame.sprite.Sprite):
 def __init__(self):
 pygame.sprite.Sprite.__init__(self)
 self.image = (walkDown[4//3])
 self.rect = self.image.get_rect()
 self.rect.centerx = width / 2
 self.rect.bottom = height / 2
 self.speedx = 0
 self.speedy = 0
 self.velocity = 2

 self.walkCount = 4 # <---- add attribute

 def update(self):

 # [...]

 # walkCount = 4 <------ delete local variable

 keys = pygame.key.get_pressed()
 down = keys[pygame.K_DOWN]
 up = keys[pygame.K_UP]
 right = keys[pygame.K_RIGHT]
 left = keys[pygame.K_LEFT]
 run = False

 if self.walkCount + 1 >= 9:
 self.walkCount = 0
 if (down == True and run == False):
 self.walkCount += 1
 self.image = (walkDown[self.walkCount//3]) 
 elif (up == True and run == False):
 self.walkCount += 1
 self.image = (walkUp[self.walkCount//3])
 elif (right == True and run == False):
 self.walkCount += 1
 self.image = (walkRight[self.walkCount//3])
 elif (left == True and run == False):
 self.walkCount += 1
 self.image = (walkLeft[self.walkCount//3])