game-of-life.py

from random import randint
from time import sleep
from copy import deepcopy
import os

LIFE = 1
DEATH = 0

def main():
    cols, rows = 7, 7

    area = [[0 for i in range(cols)] for j in range(rows)]
    glider(area, cols, rows)
    start(area, rows, cols)


def glider(area, rows, cols):
    x, y = randint(0, rows - 1), randint(0, cols - 1)

    area[x][y] = LIFE

    area[(x + 1) % rows][(y + 1) % cols] = LIFE
    area[(x + 1) % rows][(y + 2) % cols] = LIFE
    
    area[(x + 2) % rows][y] = LIFE
    area[(x + 2) % rows][y + 1] = LIFE
    area[(x + 2) % rows][y + 1] = LIFE


def start(area, rows, cols):
    interval = 0.5

    while(True):
        printArea(area)
        newArea = deepcopy(area)
        for i in range(rows):
            for j in range(cols):
                newArea[i][j] = nextState(i, j, area, rows, cols)
        area = newArea
        sleep(interval)


def nextState(i, j, area, rows, cols):
    total = (
        area[(i - 1) % rows][(j - 1) % cols] +
        area[(i - 1) % rows][j] +
        area[(i - 1) % rows][(j + 1) % cols] +
        area[i][(j + 1) % cols] +
        area[(i + 1) % rows][(j + 1) % cols] +
        area[(i + 1) % rows][j] +
        area[(i + 1) % rows][(j - 1) % cols] +
        area[i][(j - 1) % cols]
    )

    if area[i][j] == LIFE:
        if total > 3 or total < 2:
            return DEATH
    elif area[i][j] == DEATH:
        if total == 3:
            return LIFE
    
    return area[i][j] 


def printArea(area):
    os.system('clear')
    print('\n'.join([''.join([char(cell) for cell in row]) for row in area]))


def char(n):
    if n == LIFE: return '*'

    return '-'

main()