Conway's Game of Life - functional python from https://youtu.be/o9pEzgHorH0?feature=shared&t=1040

life.py

import sys

from itertools import chain
from time import sleep


def neighbors(point):
    x, y = point
    yield x + 1, y
    yield x - 1, y
    yield x, y + 1
    yield x, y - 1
    yield x + 1, y + 1
    yield x + 1, y - 1
    yield x - 1, y + 1
    yield x - 1, y - 1


def advance(board):
    newstate = set()
    recalc = board | set(chain(*map(neighbors, board)))
    for point in recalc:
        count = sum((neigh in board) for neigh in neighbors(point))
        if count == 3 or (count == 2 and point in board):
            newstate.add(point)
    return newstate


def print_board(board, *, min_point=None, max_point=None):
    min_x = min_point[0] if min_point is not None else min(x for (x, _) in board)
    min_y = min_point[1] if min_point is not None else min(y for (_, y) in board)
    max_x = max_point[0] if max_point is not None else max(x for (x, _) in board)
    max_y = max_point[1] if max_point is not None else max(y for (_, y) in board)
    for x in range(min_x, max_x + 1):
        for y in range(min_y, max_y + 1):
            point = x, y
            yield '•' if point in board else ' '
        yield '\n'


board_size = dict(min_point=(0, -2), max_point=(17, 20))
glider = set([ (1,0),   (2,1),   (2,2),  (1,2),  (0,2) ])
star   = set([ (10,12), (10,14), (9,13), (11,13) ])
board = glider | star

for x in range(112):
    sys.stdout.write('\x1bc  ┌')
    sys.stdout.write('─' * 23)
    sys.stdout.write('┐\n  │')
    for char in print_board(board, **board_size):
        sys.stdout.write('│\n  │' if char == '\n' else char)
    sys.stdout.write('\b└')
    sys.stdout.write('─' * 23)
    sys.stdout.write(f'┘\n           step={x}\n\n')

    sleep(1 / 12)
    board = advance(board)

load_coord.py

#!/usr/bin/env python3

import sys


def read_coordinates(filename, active_cell='#'):
    with open(filename, 'r') as board:
        lines = board.readlines()
        for y, line in enumerate(lines):
            for x, c in enumerate(line.rstrip()):
                if c == active_cell:
                    yield x, y


if __name__ == "__main__":
    _args = iter(sys.argv[1:])
    _filename_arg = next(_args, None)
    if _filename_arg is None:
        print("Usage: lcoord.py <board.lfe> [active-cell]")
    else:
        print("board = set([")
        for x, y in read_coordinates(_filename_arg, active_cell=next(_args, '#')):
            print(f"    ({x}, {y}),")
        print("])")

Pulsar start:

.................
.................
....###...###....
.................
..#....#.#....#..
..#....#.#....#..
..#....#.#....#..
....###...###....
.................
....###...###....
..#....#.#....#..
..#....#.#....#..
..#....#.#....#..
.................
....###...###....
.................
.................