Error while import a python package called h5py #61

Good morning,
I try to use C++ demo20 to test the import of lib H5PY but I have the following message from console when I execute these lines;
"import os
import time
import copy
import numpy as np
np.set_printoptions(precision=6, threshold=20, suppress=True, linewidth=100)

import h5py"

Error message is:
Traceback (most recent call last):
File "", line 7, in
File "C:\Anaconda3\lib\site-packages\h5py_init_.py", line 33, in
from . import version
File "C:\Anaconda3\lib\site-packages\h5py\version.py", line 15, in
from . import h5 as _h5
File "h5py\h5.pyx", line 1, in init h5py.h5
ImportError: DLL load failed while importing defs: La procédure spécifiée est introuvable.

Any idea on how to fix it please?