运行tensorflow测试程序时，出现：FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`. from ._conv import register_converters as _register_converters
解决办法：
pip install h5py==2.8.0rc1