settings.py

import sys

from pymongo.read_preferences import ReadPreference


# Mongo section
# MONGO_HOST = 'localhost'
# MONGO_PORT = 27017
# MONGO_DB_NAME = 'grid_fs'

# MONGO_REPLICATION_ON = True
# MONGO_REPLICA_SET_URI = 'localhost:27017,localhost:27018'
# MONGO_REPLICA_SET_NAME = 'test_set'
# MONGO_READ_PREFERENCE = ReadPreference.PRIMARY_PREFERRED

# MONGO_PASSWORD = None
# MONGO_USER = None


MONGO_DB_URL = 'mongodb://localhost:27017,localhost:27018/grid_fs?' \
               'replicaSet=test_set&readPreference=primaryPreferred'

# App section for builtin server
APP_HOST = '0.0.0.0'
APP_PORT = 5000
DEBUG = True

try:
    from settings_local import *
except ImportError:
    pass

if 'test' in sys.argv[0]:  # Is there another way?
    try:
        from settings_test import *
    except ImportError:
        pass