func_code: def overlap(x1=0, y1=0, r1=1, x2=0, y2=0, r2=1):
      rad = (r1 + r2) ** 2
      xs = (x1 - x2) ** 2
      ys = (y1 - y2) ** 2
      both_x_y = xs + ys
      if rad > both_x_y:
          return True
      else:
          return False