transforms.py

import pygame
import random

BLACK = (0,0,0)

pygame.init()
WIDTH = 450
HEIGHT = 600
screen = pygame.display.set_mode([WIDTH, HEIGHT])

another_loop = True
clock = pygame.time.Clock()

#Assumes an image names bwclear1.gif is in the current directory
lsprite = pygame.image.load("bwclear1.gif") #load an image (blit it onto screen later)
rsprite = pygame.transform.flip(lsprite, True, False) #this is a right facing copy

sprite = lsprite #this variable will store the current directioned version

wx = 100
wy = 100
scale = 1.0 #I'm going to also allow scaling up and down
wiz_w, wiz_h = lsprite.get_size() #We can get the original dimensions this way
  
while another_loop:
    # --- Basic Event Processing
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            another_loop = False

    # Every loop we will wipe the screen and redraw images
    screen.fill(BLACK)

    if( pygame.key.get_pressed()[pygame.K_LEFT] != 0 ):
        wx = (wx - 2) % WIDTH
        sprite = lsprite
    if( pygame.key.get_pressed()[pygame.K_RIGHT] != 0 ):
        wx = (wx + 2) % WIDTH
        sprite = rsprite

    if( pygame.key.get_pressed()[pygame.K_UP] != 0 ):
        scale += .1
    if( pygame.key.get_pressed()[pygame.K_DOWN] != 0 ):
        scale -= .1
        if scale < .3:
            scale = .3

    #Then at blit time I'll make a scaled copy of the left or right facing normal sprite
    screen.blit(pygame.transform.scale(sprite, (int(wiz_w*scale), int(wiz_h*scale))), (wx, wy))

    #This sets the frames per second
    clock.tick(60)
 
    #This puts the new stuff you've drawn on screen
    pygame.display.flip()

#When we've left the while loop exit pygame 
pygame.quit()