some error in symbol

[zhui064]

when setting the groups = 4, 8, it seems that some errors will occur.

[Nateliu712]

I met the same problem. And I compare this code with the https://github.com/jaxony/ShuffleNet and the paper. I find the 3*3 convolution in the bottleneck unit should be depthwise convolution which means "groups=bottleneck_channels", while in this code "num_group=groups". @ZiyueHuang @zhui064