How to use 'snake game code in python' in Python

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119def run_game():
120 # this function runs the game
121 snake = Snake()
122 apple = Apple()
123 while True:
124 for event in pygame.event.get():
125 if event.type == pygame.QUIT:
126 pygame.quit()
127 sys.exit()
128 elif event.type == pygame.KEYDOWN:
129 if event.key == pygame.K_ESCAPE:
130 pygame.quit()
131 sys.exit()
132 # don't move in the opposite direction
133 elif event.key == pygame.K_LEFT and snake.dir != 'r':
134 snake.dir = 'l'
135 elif event.key == pygame.K_RIGHT and snake.dir != 'l':
136 snake.dir = 'r'
137 elif event.key == pygame.K_UP and snake.dir != 'd':
138 snake.dir = 'u'
139 elif event.key == pygame.K_DOWN and snake.dir != 'u':
140 snake.dir = 'd'
141
142 if snake.eat(apple):
143 # make a new apple
144 apple = Apple()
145 else:
146 # remove the last segment from the snake (it stayed the same size)
147 del snake.coords[-1]
148
149 snake.move()
150 if snake.hit():
151 # dead - play the hit sound and return the score
152 snake.hit_snd.play()
153 return len(snake.coords) - 3
154
155 # Update screen
156 screen.fill(BGCOLOR)
157 draw_grid()
158 draw_score(len(snake.coords) - 3)
159 snake.draw()
160 apple.draw()
161 pygame.display.flip()
162 clock.tick(FPS)
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