Reminder of what you should do :

open developper pannel
go to console
enter the following

IPython.notebook.config.update({
  "load_extensions": {"hello-scipy":true}
})



In [2]:

    
# you will probably need this line to be sure your extension works
import datetime as d
d.datetime.now()









    Out[2]:





datetime.datetime(2017, 10, 29, 15, 56, 22, 478529)



In [ ]: