generate abstract ascii patterns

abstract-ascii.py

from numpy import meshgrid
from random import choice, randrange
import argparse

parser = argparse.ArgumentParser()

parser = argparse.ArgumentParser(description='generate abstract ascii patterns')
parser.add_argument('width', type=int, nargs='?', default=15);
parser.add_argument('height', type=int, nargs='?', default=9);

args = parser.parse_args();

def pattern(width=15, height=9):
    x, y = meshgrid(range(width), range(height));
    base = f"(x {choice(['^', '|', '&'])} y)";
    tweak = f" {choice(['|', '*', '**'])} {randrange(1, 10)}";
    modulo = f" % {randrange(4, 10)}";
    eq = base + tweak + modulo;
    i = (1 == eval(eq)) * ord("．");
    pixels = [pixel for array in i for pixel in array];
    if all(pixel == 0 for pixel in pixels):
        return pattern();
    else:
        pixels = [chr(x) if x != 0 else "　" for x in pixels];
        pixels = list("".join(l + "\n" * (n % width == (width - 1)) for n, l in enumerate(pixels)));
        return(eq + '\n' + "".join(pixels));

print(pattern(args.width, args.height));