why the foward fuction is the list inputs features?

[Coco9zZZ]

[tensor([[[104, 104, 103, ..., 99, 99, 100],
[103, 102, 101, ..., 103, 105, 106],
[104, 104, 105, ..., 105, 108, 108],
...,
[110, 113, 117, ..., 27, 28, 27],
[117, 118, 119, ..., 29, 30, 30],
[123, 123, 122, ..., 31, 32, 31]],

    [[104, 104, 103,  ...,  99,  99, 100],
     [103, 102, 101,  ..., 103, 105, 106],
     [104, 104, 105,  ..., 105, 108, 108],
     ...,
     [ 48,  33,  41,  ..., 243, 242, 238],
     [ 52,  38,  44,  ..., 239, 238, 236],
     [ 55,  43,  46,  ..., 234, 234, 235]]], device='cuda:0',
   dtype=torch.uint8)]

this is my input features x，why it is list type,but not tensor? thanks you