When I followed the instructions in AlchemistPythonDemo.ipynb, I encountered the following error: <img width="477" alt="4" src="https://user-images.githubusercontent.com/52476919/62468792-7a51c700-b7c9-11e9-8275-fae3d5d27ee5.PNG"> Btw, I downloaded hdf5 file from [https://ndownloader.figshare.com/files/7024271](url).
When I followed the instructions in AlchemistPythonDemo.ipynb, I encountered the following error:

Btw, I downloaded hdf5 file from https://ndownloader.figshare.com/files/7024271.