1import h5py 2import numpy as np 3 4arr = np.array([np.datetime64('2019-09-22T17:38:30')]) 5 6with h5py.File('datetimes.h5', 'w') as f: 7 # Create dataset 8 f['data'] = arr.astype(h5py.opaque_dtype(arr.dtype)) 9 10 # Read 11 print(f['data'][:]) 12