python - h5py writing a hdf file , question about dimension

Question

I created a new file whose handle is fw.

fw.create_dataset('grp1/grp2/grp2/varname',data=arr)

The groups are created before this command. arr is a numpy array with dimensions (2,3). The file is created successfully. However, the dimensions are named phony_0, and phony_1. How do I change them to say m and n ?

In general how does one create dimensions within a group and then associate variables with them?

Thanks

Answer 1

You could probably do something like

dataset.dims[0].label = 'm'
dataset.dims[1].label = 'n'

But really, it's all in the official docs: http://docs.h5py.org/en/latest/high/dims.html