如何根据点阵表绘制圆？

import numpy as np

def draw_circle(radius):
    size = 2 * radius + 1
    grid = np.zeros((size, size), dtype=int)

    x = radius
    y = 0
    decision = 1 - radius

    while y <= x:
        grid[radius + x][radius + y] = 1
        grid[radius + y][radius + x] = 1
        grid[radius - x][radius + y] = 1
        grid[radius + y][radius - x] = 1
        grid[radius - x][radius - y] = 1
        grid[radius - y][radius - x] = 1
        grid[radius + x][radius - y] = 1
        grid[radius - y][radius + x] = 1

        y += 1
        if decision <= 0:
            decision += 2 * y + 1
        else:
            x -= 1
            decision += 2 * (y - x) + 1

    return grid

radius = 5
circle_grid = draw_circle(radius)
for row in circle_grid:
    print(' '.join(['*' if val == 1 else ' ' for val in row]))