Transcontinental Railroad Worker

import pygame, sys, random
worker_images = ["worker_up.png", "worker_down.png", "worker_right1.png", "skier_right2.png", "skier_left2.png", "skier_left1.png"]
class WorkerClass(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load("worker_up.png")
        self.rect = self.image.get_rect()
        self.rect.center = [320, 100]
        self.angle = [0]
    def turn(self, direction):
        self.angle = self.angle + direction
        if self.angle < -2: self.angle = -2
        if self.angle >  2: self.angle =  2
        center = self.rect.center
        self.image = pygame.image.load(worker_images[self.angle])
        self.rect = self.image.get_rect()
        self.rect.center = center
        speed = [self.angle, 6 - abs(self.angle) * 2]
        return speed
    def move(self, speed):
        self.rect.centerx = self.rect.centerx + speed[0]
        if self.rect.centerx < 20: self.rect.centerx = 20
           if self.rect.centerx > 620: self.rect.centerx = 620
    def __init__(self, image_file, location, type):
        pygame.sprite.Sprite.__init__(self)
        self.image_file = image_fileself.image = pygame.image.load(image_file)
        self.rect = self.image.get_rect()
        self.rect.center = location
        self.type = type
        self.passed = False
    def update(self):
        global speed
        self.rect.centery -= speed [1]
        if self.rect.centery < -32:
            self.kill()
def create_map():
    global obstacles
    location = []
    for i in range(10):
        row = random.randint(0, 9)
        col = random.randint(0, 9)
        location  = [col * 64 + 20, row * 64 + 20 + 640]
        if not (location in locations):
            locations.append(location)
            type = random.choice(["train", "gun"])
            if type == "train: img = "worker_train.png"
            elif type == "gun": img = "worker_gun.png"
                obstacle = ObstacleClass(img, location, typebytearray)obstacle.add(obstacle)
def animate():
    screen.fill([255, 255, 255])
    obstacle.draw(screen)
    screen.blit(worker.image, worker.rect)
    screen.blit(score_text, [10, 10])
    pygame.display.flip()
pygame.init()
screen = pygame.display.set_mode([640, 480])

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