switch_bucket() sets grad_req to 'write' by default and overwrites other settings

[ArneNx]

https://github.com/apache/incubator-mxnet/blob/251ae71a20d8318ab20f4c19520f74b881fdf3ff/python/mxnet/module/bucketing_module.py#L353

I want to set the grad_req for all my parameters to 'add' by using specifying it in the bind() call on my top-level module.
The problem is that I use a BucketingModule. So when I call forward, it automatically calls the switch_bucket method, which then calls bind again without specifying grad_req and therefore setting it to 'write'.

Is this intended behavior? Can I somehow work around this while still using bucketing?

[vdantu]

@sandeep-krishnamurthy : Could you please tag this "Question", "Python"

@ArneNx : You could post this question on "discuss.mxnet.io". You would receive a wider audience.