python implementation of the ski game

# coding: utf-8
# Skiing games
import sys
import pygame
import random
from  import *
 
 
# Skier class
class SkierClass():
 def __init__(self):
 .__init__(self)
 # Skier orientation (-2 to 2)
  = 0
  = ["./images/skier_forward.png", "./images/skier_right1.png", "./images/skier_right2.png", "./images/skier_left2.png", "./images/skier_left1.png"]
  = ([])
  = .get_rect()
  = [320, 100]
  = [, 6-abs()*2]
 # Change the skier's orientation
 # 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 skiers
 def move(self):
  += [0]
  = max(20, )
  = min(620, )
 
 
# Obstacle class
# Input:
# -img_path: obstacle image path
# -location: obstacle location
# -attribute: obstacle category 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
 
 
# Create obstacles
def create_obstacles(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 = (["tree", "flag"])
 img_path = './images/' if attribute=="tree" else './images/'
 obstacle = ObstacleClass(img_path, location, attribute)
 (obstacle)
 return obstacles
 
 
# Merging obstacles
def AddObstacles(obstacles0, obstacles1):
 obstacles = ()
 for obstacle in obstacles0:
 (obstacle)
 for obstacle in obstacles1:
 (obstacle)
 return obstacles
 
 
# Display the game start screen
def Show_Start_Interface(Demo, width, height):
 ((255, 255, 255))
 tfont = ('./font/', width//4)
 cfont = ('./font/', width//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()
  = (width/2, height/10)
 crect = content.get_rect()
  = (width/2, height/2.2)
 (title, trect)
 (content, crect)
 ()
 while True:
 for event in ():
 if  == QUIT:
 ()
 elif  == :
 return
 
 
# Main program
def main():
 '''
 Initialization
 '''
 ()
 # Voices
 ()
 ("./music/bg_music.mp3")
 .set_volume(0.4)
 (-1)
 # Screen
 screen = .set_mode([640, 640])
 .set_caption('Ski Games - Public:Charles' Pikachu')
 # mains frequency
 clock = ()
 # Skiers
 skier = SkierClass()
 # Record the distance skied
 distance = 0
 # Create obstacles
 obstacles0 = create_obstacles(20, 29)
 obstacles1 = create_obstacles(10, 19)
 obstaclesflag = 0
 obstacles = AddObstacles(obstacles0, obstacles1)
 # Scores
 font = (None, 50)
 score = 0
 score_text = ("Score: "+str(score), 1, (0, 0, 0))
 # Speed
 speed = [0, 6]
 Show_Start_Interface(screen, 640, 640)
 '''
 Main loop
 '''
 # Update the screen
 def update():
 ([255, 255, 255])
 ((screen))
 (, )
 (score_text, [10, 10])
 ()
 
 while True:
 # Left and right keys to control the direction of the character
 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)
 ()
 distance += speed[1]
 if distance >= 640 and obstaclesflag == 0:
 obstaclesflag = 1
 obstacles0 = create_obstacles(20, 29)
 obstacles = AddObstacles(obstacles0, obstacles1)
 if distance >= 1280 and obstaclesflag == 1:
 obstaclesflag = 0
 distance -= 1280
 for obstacle in obstacles0:
 [1] = [1] - 1280
 obstacles1 = create_obstacles(10, 19)
 obstacles = AddObstacles(obstacles0, obstacles1)
 # For collision detection
 for obstacle in obstacles:
 (distance)
 # Collision detection
 is_hit = (skier, obstacles, False)
 if is_hit:
 if is_hit[0].attribute == "tree" and not is_hit[0].passed:
 score -= 50
  = ("./images/skier_fall.png")
 update()
 # Pause for a moment after you fall and then get back up
 (1000)
  = ("./images/skier_forward.png")
  = 0
 speed = [0, 6]
 is_hit[0].passed = True
 elif is_hit[0].attribute == "flag" and not is_hit[0].passed:
 score += 10
 (is_hit[0])
 score_text = ("Score: "+str(score), 1, (0, 0, 0))
 update()
 (40)
 
 
if __name__ == '__main__':
 main()