Trying to get the next value in sequence from a postgres DB, with django

This code will work:

from django.db import connection, transaction

cursor = connection.cursor()
cursor.execute("select nextval('winner')")
result = cursor.fetchone()

full documentation about cursor

cursor.execute always returns None.

To get the value from the SQL statement, you have to use cursor.fetchone() (or fetchall()).

See the documentation, although note that this doesn't actually have anything to do with Django, but is the standard Python SQL DB API.