Example: Image 4 way direction by key.

import pygame

class Scene:
    def __init__(self, control):
        self.control = control

    def on_draw(self, surface):
        pass

    def on_event(self, event):
        pass

    def on_update(self, delta):
        pass

class Control:
    def __init__(self, caption, size, flags=0, fps=60):
        pygame.display.set_caption(caption)
        self.display = pygame.display.set_mode(size, flags)
        self.rect = self.display.get_rect()
        self.clock = pygame.time.Clock()
        self.running = True
        self.delta = 0
        self.fps = fps

        self.scene = None

    def run(self, scene):
        self.scene = scene
        while self.running:
            for event in pygame.event.get():
                if event.type != pygame.QUIT:
                    self.scene.on_event(event)
                else:
                    self.running = False

            self.scene.on_update(self.delta)
            self.scene.on_draw(self.display)
            pygame.display.flip()
            self.delta = self.clock.tick(self.fps) / 1000

class ImageHandler:
    def __init__(self):
        self.frog = self.create_frog((30, 26), 'lawngreen')

    def create_frog(self, size, color):
        rect = pygame.Rect((0, 0), size)
        points = rect.midright, rect.bottomleft, rect.topleft
        surface = pygame.Surface(size, pygame.SRCALPHA)
        surface.fill((0, 0, 0, 0))
        pygame.draw.polygon(surface, color, points)

        image_right = surface
        image_left = pygame.transform.rotate(surface, 180)
        image_up = pygame.transform.rotate(surface, 90)
        image_down = pygame.transform.rotate(surface, -90)

        return {
            pygame.K_RIGHT: image_right,
            pygame.K_d: image_right,
            pygame.K_LEFT: image_left,
            pygame.K_a: image_left,
            pygame.K_UP: image_up,
            pygame.K_w: image_up,
            pygame.K_DOWN: image_down,
            pygame.K_s: image_down
        }

class Player:
    def __init__(self, frames, position, anchor):
        self.frames = frames
        self.image = frames[pygame.K_UP]
        self.rect = self.image.get_rect(**{anchor: position})

    def draw(self, surface):
        surface.blit(self.image, self.rect)

    def keydown(self, key):
        if key in self.frames:
            self.image = self.frames[key]
            self.rect = self.image.get_rect(center=self.rect.center)

class Example(Scene):
    def __init__(self, control):
        super().__init__(control)
        self.image = ImageHandler()
        self.player = Player(self.image.frog, self.control.rect.center, 'center')

    def on_draw(self, surface):
        surface.fill('black')
        self.player.draw(surface)

    def on_event(self, event):
        if event.type == pygame.KEYDOWN:
            self.player.keydown(event.key)

pygame.init()
control = Control("Example", (800, 600))
control.run(Example(control))
pygame.quit()