Making an ULTIMATE SNAKE GAME In PYTHON

Hey there,
This video is about making an Ultimate Snake Game in Python.
The Code to this program is -
import random
import curses

s = curses.initscr()
curses.curs_set(0)
sh, sw = s.getmaxyx()
w = curses.newwin(sh, sw, 0, 0)
w.keypad(1)
w.timeout(100)

snk_x = sw/4
snk_y = sh/2
snake = [
[snk_y, snk_x],
[snk_y, snk_x-1],
[snk_y, snk_x-2]
]

food = [sh/2, sw/2]
w.addch(int(food[0]), int(food[1]), curses.ACS_PI)

key = curses.KEY_RIGHT

while True:
next_key = w.getch()
key = key if next_key == -1 else next_key

if snake[0][0] in [0, sh] or snake[0][1] in [0, sw] or snake[0] in snake[1:]:
curses.endwin()
quit()

new_head = [snake[0][0], snake[0][1]]

if key == curses.KEY_DOWN:
new_head[0] += 1
if key == curses.KEY_UP:
new_head[0] -= 1
if key == curses.KEY_LEFT:
new_head[1] -= 1
if key == curses.KEY_RIGHT:
new_head[1] += 1

snake.insert(0, new_head)

if snake[0] == food:
food = None
while food is None:
nf = [
random.randint(1, sh-1),
random.randint(1, sw-1)
]
food = nf if nf not in snake else None
w.addch(food[0], food[1], curses.ACS_PI)
else:
tail = snake.pop()
w.addch(int(tail[0]), int(tail[1]), ' ')

w.addch(int(snake[0][0]), int(snake[0][1]), curses.ACS_CKBOARD)


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