AttributeError: 'tuple' object has no attribute 'size'

[OpenAI-chn]

np.array(output.size()[1:], dtype=np.int32))

AttributeError: 'tuple' object has no attribute 'size'

[Beta-Hu]

I have meet the same problem today, and it may caused by a MaxPool2d operation with argument return_indices=True, because when requires indices, MaxPool2d will return a tuple, rather than a Tensor when return_indices=False.
这可能是因为你将MaxPool2d的参数return_indices设置为了True，此时MaxPool2d返回的是一个包含池化结果和下标的元组。