bug fix in Database.py
bug fix in Database.py

shaunharker/DSGRN,breecummins/DSGRN,shaunharker/DSGRN,shaunharker/DSGRN,breecummins/DSGRN,shaunharker/DSGRN,shaunharker/DSGRN,breecummins/DSGRN,breecummins/DSGRN,breecummins/DSGRN,breecummins/DSGRN,shaunharker/DSGRN,shaunharker/DSGRN,breecummins/DSGRN