Update notebook to be compatible with Python 3 and newly created data directory
Update notebook to be compatible with Python 3 and newly created data directory

LSSTC-DSFP/LSSTC-DSFP-Sessions,LSSTC-DSFP/LSSTC-DSFP-Sessions,LSSTC-DSFP/LSSTC-DSFP-Sessions,mjuric/LSSTC-DSFP-Sessions