import torch

import torch.nn.functional as F

x1= torch.Tensor( [ [1,2,3,4],[1,3,4,5],[3,4,5,6]])

y11= F.softmax(x, dim = 0) #对每一列进行softmax

y12 = F.softmax(x,dim =1) #对每一行进行softmax

x2 = torch.Tensor([1,2,3,4])

y2 = F.softmax(x2,dim=0)