def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def connect ():
    '''
    Create the connection to the MongoDB and create 3 collections needed
    '''
    try:
        # Create the connection to the local host 
        conn = pymongo.MongoClient()
        print 'MongoDB Connection Successful'
    except pymongo.errors.ConnectionFailure, err:
        print 'MongoDB Connection Unsuccessful'
        return False