Python implementation of the skiing game

import sys
import cfg
import pygame
import random
 
 
'''Skier class'''
class SkierClass():
    def __init__(self):
        .__init__(self)
        # Skier orientation (-2 to 2)
         = 0
         = cfg.SKIER_IMAGE_PATHS[:-1]
         = ([])
         = .get_rect()
         = [320, 100]
         = [, 6-abs()*2]
    '''Change the skier's facing direction . Negative numbers are to the left, positive numbers are to the right, and 0 is forward'''
    def turn(self, num):
         += num
         = max(-2, )
         = min(2, )
        center = 
         = ([])
         = .get_rect()
         = center
         = [, 6-abs()*2]
        return 
    '''Mobile Skier'''
    def move(self):
         += [0]
         = max(20, )
         = min(620, )
    '''Set to fall status'''
    def setFall(self):
         = (cfg.SKIER_IMAGE_PATHS[-1])
    '''Set to standing'''
    def setForward(self):
         = 0
         = ([])
 
 
'''
Function.
    Obstacle Class
Input.
    img_path: Obstacle image path
    location: Obstacle location
    attribute: Obstacle class attribute
'''
class ObstacleClass():
    def __init__(self, img_path, location, attribute):
        .__init__(self)
        self.img_path = img_path
         = (self.img_path)
         = location
         = .get_rect()
         = 
         = attribute
         = False
    '''Move'''
    def move(self, num):
         = [1] - num
 
 
'''Creating obstacles'''
def createObstacles(s, e, num=10):
    obstacles = ()
    locations = []
    for i in range(num):
        row = (s, e)
        col = (0, 9)
        location  = [col*64+20, row*64+20]
        if location not in locations:
            (location)
            attribute = (list(cfg.OBSTACLE_PATHS.keys()))
            img_path = cfg.OBSTACLE_PATHS[attribute]
            obstacle = ObstacleClass(img_path, location, attribute)
            (obstacle)
    return obstacles
 
 
'''Consolidation of obstacles'''
def AddObstacles(obstacles0, obstacles1):
    obstacles = ()
    for obstacle in obstacles0:
        (obstacle)
    for obstacle in obstacles1:
        (obstacle)
    return obstacles
 
 
'''Show game start screen'''
def ShowStartInterface(screen, screensize):
    ((255, 255, 255))
    tfont = (, screensize[0]//5)
    cfont = (, screensize[0]//20)
    title = (u'Ski game', True, (255, 0, 0))
    content = (u'Press any key to start the game', True, (0, 0, 255))
    trect = title.get_rect()
     = (screensize[0]/2, screensize[1]/5)
    crect = content.get_rect()
     = (screensize[0]/2, screensize[1]/2)
    (title, trect)
    (content, crect)
    while True:
        for event in ():
            if  == :
                ()
                ()
            elif  == :
                return
        ()
 
 
'''Show scores'''
def showScore(screen, score, pos=(10, 10)):
    font = (, 30)
    score_text = ("Score: %s" % score, True, (0, 0, 0))
    (score_text, pos)
 
 
'''Update the current frame of the game'''
def updateFrame(screen, obstacles, skier, score):
    ((255, 255, 255))
    (screen)
    (, )
    showScore(screen, score)
    ()
 
 
'''Main program'''
def main():
    # Game initialization
    ()
    ()
    ()
    .set_volume(0.4)
    (-1)
    # Setting up the screen
    screen = .set_mode()
    .set_caption('Ski game -- Nine Songs')
    # Game start screen
    ShowStartInterface(screen, )
    # Instantiate game sprites
    # -- skier
    skier = SkierClass()
    # --Creating obstacles
    obstacles0 = createObstacles(20, 29)
    obstacles1 = createObstacles(10, 19)
    obstaclesflag = 0
    obstacles = AddObstacles(obstacles0, obstacles1)
    # Gameclock
    clock = ()
    # Record the distance skied
    distance = 0
    # Record the current score
    score = 0
    # Record the current speed
    speed = [0, 6]
    # The main game loop
    while True:
        # --Event Capture
        for event in ():
            if  == :
                ()
                ()
            if  == :
                if  == pygame.K_LEFT or  == pygame.K_a:
                    speed = (-1)
                elif  == pygame.K_RIGHT or  == pygame.K_d:
                    speed = (1)
        # --Update the data of the current game frame
        ()
        distance += speed[1]
        if distance >= 640 and obstaclesflag == 0:
            obstaclesflag = 1
            obstacles0 = createObstacles(20, 29)
            obstacles = AddObstacles(obstacles0, obstacles1)
        if distance >= 1280 and obstaclesflag == 1:
            obstaclesflag = 0
            distance -= 1280
            for obstacle in obstacles0:
                [1] = [1] - 1280
            obstacles1 = createObstacles(10, 19)
            obstacles = AddObstacles(obstacles0, obstacles1)
        for obstacle in obstacles:
            (distance)
        # -- collision detection
        hitted_obstacles = (skier, obstacles, False)
        if hitted_obstacles:
            if hitted_obstacles[0].attribute == "tree" and not hitted_obstacles[0].passed:
                score -= 50
                ()
                updateFrame(screen, obstacles, skier, score)
                (1000)
                ()
                speed = [0, 6]
                hitted_obstacles[0].passed = True
            elif hitted_obstacles[0].attribute == "flag" and not hitted_obstacles[0].passed:
                score += 10
                (hitted_obstacles[0])
        # --update screen
        updateFrame(screen, obstacles, skier, score)
        ()
 
 
'''run'''
if __name__ == '__main__':
    main()；