snake.py

import curses
from curses import KEY_RIGHT, KEY_LEFT, KEY_UP, KEY_DOWN
from random import randint
curses.initscr() #initialize screen
window = curses.newwin(30, 60, 0, 0) #create new window H=30, W=60
window.keypad(True) #enable keypad
curses.noecho() #turn off automatic echoing of keys to the screen
curses.curs_set(0)
window.nodelay(True) #do not wait for the user input
#initiate values
key = KEY_RIGHT
score = 0
#initialize first food and snake coordinates
snake = [[5,8], [5,7], [5,6]]
food = [10,25]
#display the first food
window.addch(food[0], food[1], 'O')
while key != 27: # While they Esc key is not pressed
  window.border(0)
  #display the score and title
  window.addstr(0, 2, 'Score: ' + str(score) + ' ') 
  window.addstr(0, 27, ' SNAKE! ')
  #make the snake faster as it eats more
  window.timeout(140 - (len(snake)/5 + len(snake)/10)%120)
  #refreshes the screen and then waits for the user to hit a key
  event = window.getch()
  key = key if event == -1 else event
  
  #Calculates the new coordinates of the head of the snake.
  snake.insert(0, [snake[0][0] + (key == KEY_DOWN and 1) + (key == KEY_UP and -1), snake[0][1] + (key == KEY_LEFT and -1) + (key == KEY_RIGHT and 1)])
  #Exit if snake crosses the boundaries (Uncomment to enable)
  if snake[0][0] == 0 or snake[0][0] == 29 or snake[0][1] == 0 or  snake[0][1] == 59: break
  #Exit if snake runs over itself
  if snake[0] in snake[1:]: break
  
  #When snake eats the food
  if snake[0] == food:
    food = []
    score += 1
    while food == []:
      #Generate coordinates for next food
      food = [randint(1, 28), randint(1, 58)]
      if food in snake: food = []
    window.addch(food[0], food[1], 'O') #display the food
  else:
    last = snake.pop()
    window.addch(last[0], last[1], ' ')
  window.addch(snake[0][0], snake[0][1], '#') #add food to snakes tail
  curses.endwin() #close the window and end the game
print("\nScore: " + str(score))