downsample.py

import glob
import h5py

for fpath in glob.glob('modelnet_c/*.h5'):
    f = h5py.File(fpath)
    data = f['data'][:].astype('float32')
    label = f['label'][:].astype('int64')
    f.close()
    f = h5py.File(fpath, 'w')
    f.create_dataset('data', data=data[:100])
    f.create_dataset('label', data=label[:100])
    f.close()