Created by: zzz2010

Hi, in pytorch , we can set affine=False in InstanceNorm to turn off bias term.
However in paddle 1.8, we can not set bias_attrs=False in InstanceNorm

https://github.com/PaddlePaddle/Paddle/blob/release/1.8/python/paddle/fluid/dygraph/nn.py#L1052

May I know how to reproduce result as InstanceNorm in pytorch using paddle?

Thank you