func_code: def overlap(x1=0, y1=0, r1=0, x2=0, y2=0, r2=1):
      distanceX = x1 - x2
      distanceY = y1 - y2
      radiusSum = r1 + r2
      return (distanceX * distanceX + distanceY * distanceY <= radiusSum *
          radiusSum)