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These are some of my python recipes:

This is a snake snake game using the python library pygame.

        
  import pygame
   
  # --- Globals ---
  # Colors
  BLACK = (0, 0, 0)
  WHITE = (255, 255, 255)
   
  # Set the width and height of each snake segment
  segment_width = 15
  segment_height = 15
  # Margin between each segment
  segment_margin = 3
   
  # Set initial speed
  x_change = segment_width + segment_margin
  y_change = 0
   
   
  class Segment(pygame.sprite.Sprite):
      """ Class to represent one segment of the snake. """
      # -- Methods
      # Constructor function
      def __init__(self, x, y):
          # Call the parent's constructor
          super().__init__()
   
          # Set height, width
          self.image = pygame.Surface([segment_width, segment_height])
          self.image.fill(WHITE)
   
          # Make our top-left corner the passed-in location.
          self.rect = self.image.get_rect()
          self.rect.x = x
          self.rect.y = y
   
  # Call this function so the Pygame library can initialize itself
  pygame.init()
   
  # Create an 800x600 sized screen
  screen = pygame.display.set_mode([800, 600])
   
  # Set the title of the window
  pygame.display.set_caption('Snake Example')
   
  allspriteslist = pygame.sprite.Group()
   
  # Create an initial snake
  snake_segments = []
  for i in range(15):
      x = 250 - (segment_width + segment_margin) * i
      y = 30
      segment = Segment(x, y)
      snake_segments.append(segment)
      allspriteslist.add(segment)
   
   
  clock = pygame.time.Clock()
  done = False
   
  while not done:
   
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              done = True
   
          # Set the speed based on the key pressed
          # We want the speed to be enough that we move a full
          # segment, plus the margin.
          if event.type == pygame.KEYDOWN:
              if event.key == pygame.K_LEFT:
                  x_change = (segment_width + segment_margin) * -1
                  y_change = 0
              if event.key == pygame.K_RIGHT:
                  x_change = (segment_width + segment_margin)
                  y_change = 0
              if event.key == pygame.K_UP:
                  x_change = 0
                  y_change = (segment_height + segment_margin) * -1
              if event.key == pygame.K_DOWN:
                  x_change = 0
                  y_change = (segment_height + segment_margin)
   
      # Get rid of last segment of the snake
      # .pop() command removes last item in list
      old_segment = snake_segments.pop()
      allspriteslist.remove(old_segment)
   
      # Figure out where new segment will be
      x = snake_segments[0].rect.x + x_change
      y = snake_segments[0].rect.y + y_change
      segment = Segment(x, y)
   
      # Insert new segment into the list
      snake_segments.insert(0, segment)
      allspriteslist.add(segment)
   
      # -- Draw everything
      # Clear screen
      screen.fill(BLACK)
   
      allspriteslist.draw(screen)
   
      # Flip screen
      pygame.display.flip()
   
      # Pause
      clock.tick(5)
   
  pygame.quit()