cli snake start

korigyo.py

import readchar
import time
from os import system, name

def clearscreen():
    # for windows
    if name == 'nt':
        _ = system('cls') 
    # for mac and linux(here, os.name is 'posix')
    else:
        _ = system('clear')

class Snake():
    def __init__(self, pos_x=0, pos_y=0):
        self.head_col = pos_x
        self.head_row = pos_y

class Board():
    def __init__(self, width=80, height=20):
        self.width = width
        self.height = height
        self.snake = Snake(width // 2, height // 2)
        board = [ [' ' for _ in range(0, self.width)] for _ in range(0, self.height)]
        for i, row in enumerate(board):
            if i == 0 or i == (self.height - 1):
                row[0] = '+'
                row[1:-1] = '-' * (self.width - 2)
                row[-1] = '+'
            else:
                row[0] = '|'
                row[-1] = '|'
            if self.snake.head_row == i:
                row[self.snake.head_col] = 'O'
            row.append('\n')
        self.board = board

    def __str__(self):
        s = ''
        for row in self.board:
            for c in row:
                s += c
        return s

    def update_snake(self, cntrl):
        self.board[self.snake.head_row][self.snake.head_col] = ' '
        if cntrl == 'a':
            self.snake.head_col -= 1
        elif cntrl == 'd':
            self.snake.head_col += 1
        elif cntrl == 'w':
            self.snake.head_row -= 1
        elif cntrl == 's':
            self.snake.head_row += 1
        self.board[self.snake.head_row][self.snake.head_col] = 'O'

board = Board()
print(board)

while True:
    c = readchar.readchar()
    if c == 'b':
        exit(0)
    board.update_snake(c)
    clearscreen()
    print(board)
    time.sleep(0.001)