git lfs使用（huggingface下载大模型文件）

富校长:

总结：（如果":"的数字和维度不够，就会自动往后补，所以相当于后面的：可以省略：

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

print(a.shape)

print(a[:,None].shape)

print(a[:,None,:].shape)

print(a[None,:].shape)

print(a[None,:,:].shape)

print("\r\n")

print(a[None,None,:,:].shape)

print(a[None,None].shape)

print(a[:,:,None].shape)

print(a[:,:,None,None].shape)