Python script to create an HDF5 file with attributes that cannot be displayed by the H5Web VS code extension

create_h5file.py

"""
Python script to reproduce an HDF5 file which has attributes that won't be displayed
in the VS code extension "H5Web".
"""
import numpy as np
import h5py


if __name__ == "__main__":
    # create some random data, doesn't really matter
    some_data = np.random.uniform(size=(10,20,30))

    # create some metadata for the data, this includes a normal integer
    metadata = {
        "info": "randomly generated data",
        "author": "rmnldwg",
        "float": np.pi,
        "int": 42,
    }

    # create the HDF5 file
    with h5py.File("./h5web_bug.hdf5", mode="w") as h5file:
        h5dataset = h5file.create_dataset(
            name="meaningless",
            data=some_data,
        )
        for key,value in metadata.items():
            try:
                h5dataset.attrs[key] = value
            except TypeError:
                pass