显示的batch size问题

[cos4007]

无论设置的batch size是多少（4/8/32等都试过），都会显示一次如下信息。
input fields after batch(if batch size is 2):
tgt_tokens: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2, 22])
src_tokens: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2, 41])
src_seq_len: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2])
tgt_seq_len: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2])
target fields after batch(if batch size is 2):
tgt_tokens: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2, 22])
target_span: (1)type:numpy.ndarray (2)dtype:object, (3)shape:(2,)
tgt_seq_len: (1)type:torch.Tensor (2)dtype:torch.int64, (3)shape:torch.Size([2])
这一块输出没有看懂。请求作者帮忙解释一下，谢谢。