first install python package :

$ virtualenv env

Now install the python Packages :

$ pip install -r requirements.txt

Create the DB tables :

$ python database.py create

$ python main.py database create

if you need to drop the tables (careful if you drop the DB , all the tables will be lost):

$ python main.py database drop

if you need to recreate the table :

$ python main.py database recreate/