repeat()沿着特定的维度重复这个张量，按照倍数扩充1、x.repeat(a)列数乘以a倍，对x进行横向赋值import torchx = torch.tensor([1,2,3,4])print(x)print(x.shape)xnew = x.repeat(3)# 注意x的维度没有被改变，repeat后的维度仅仅传入xnew中。print(x)print(xnew)print(xnew.s