ring_oop.py

import sys
from math import sqrt


class TextWindow:
    def __init__(self, width, height, background='.'):
        self.screen = []
        self.width = width
        self.height = height
        for _ in range(height):
            row = '.' * width * 2
            self.screen.append(row)

    def draw_point(self, x, y):
        self.screen[y] = self.screen[y][:x*2] + '##' + self.screen[y][(x+1)*2:]

    def display(self):
        for row in self.screen:
            print(row)


class Ring:
    def __init__(self, radius, width):
        self.radius = radius
        self.inside_radius = radius * width
        self.origin = (radius, radius)

    def draw(self, window):
        for x in range(window.width):
            for y in range(window.height):
                distance = sqrt((self.origin[0] - x) ** 2 + (self.origin[1] - y) ** 2)
                if self.inside_radius < distance < self.radius:
                    window.draw_point(x, y)


if __name__ == '__main__':
    r = 8
    w = .7
    if len(sys.argv) > 1:
        r = int(sys.argv[1])
    if len(sys.argv) > 2:
        w = float(sys.argv[2])

    window = TextWindow((r + 1) * 2, (r + 1) * 2)
    ring = Ring(r, w)
    ring.draw(window)
    window.display()