在问我可能要改组转置数组时，

While asking I thought about maybe I could shuffle the transposed array:

 np.random.shuffle(np.transpose(r))

看起来确实可以完成.我希望通过评论了解这是否是实现此目标的好方法.

It looks like it does the job. I'd appreciate comments to know if it's a good way of achieving this.