def on_cleanup_error(function, path, excinfo):
                click.secho("warning: failed to remove file or directory: {}\n"
                            "please delete it manually.".format(path),
                            fg="red")
def _split_horizontal(container):
		r1 = None
		r2 = None
		min_h = int(H_RATIO*container.w)+1
		if container.h < 2*min_h:
			return None
		r1 = Container(container.x,container.y,container.w,randint(min_h, container.h-min_h))
		r2 = Container(container.x,container.y+r1.h,container.w,container.h-r1.h)
		return [r1, r2]