config.py

import os
basedir = os.path.abspath(os.path.dirname(__file__))

import yaml

def read_yaml_configuration_for(config_type):

    file_name = "{0}.yml".format(config_type) # example: database.yml
    if os.path.isfile(file_name):
        with open(file_name, 'r') as f:
            config_from_file = yaml.load(f)
    else:
        raise Exception("{0} configuration not found. "\
                        "Copy +{0}.yml.example+ as +{0}.yml+ "\
                        "and update the configuration to match "\
                        "your system's.".format(config_type))
    return config_from_file


db_config = read_yaml_configuration_for('database')
app_config = read_yaml_configuration_for('application')

class Config(object):
    DEBUG = False
    TESTING = False
    ACTION_PERMISSIONS=['admin_points', 'admin_points_new', 'admin_points_create', 'admin_points_edit', 'admin_points_update', 'admin_points_delete', 'admin_powerlines', 'admin_powerlines_new', 'admin_powerlines_create', 'admin_powerlines_edit', 'admin_powerlines_update', 'admin_powerlines_delete']
    GOOGLE_CLIENT_ID='498377614550-0q8d0e0fott6qm0rvgovd4o04f8krhdb.apps.googleusercontent.com'
    GOOGLE_CLIENT_SECRET='OcxQ8mW4eSizqjchgpwKArHH'
    WTF_CSRF_ENABLED = True
    SECRET_KEY = 'you-will-never-guess'
    SQLALCHEMY_MIGRATE_REPO = os.path.join(basedir, 'db_repository')


database_uri = "postgresql://{0}:{1}@{2}:{3}/{4}"

class Development(Config):
    DEBUG = True
    OSMAPI_CONFIG = app_config['development']['osmapi']
    SQLALCHEMY_DATABASE_URI = database_uri.format(db_config['development']['user'],
                                                  db_config['development']['password'],
                                                  db_config['development']['host'],
                                                  db_config['development']['port'],
                                                  db_config['development']['database'])

class Production(Config):
    OSMAPI_CONFIG = app_config['production']['osmapi']
    SQLALCHEMY_DATABASE_URI = database_uri.format(db_config['production']['user'],
                                                  db_config['production']['password'],
                                                  db_config['production']['host'],
                                                  db_config['production']['port'],
                                                  db_config['production']['database'])

class Test(Config):
    DEBUG = True
    OSMAPI_CONFIG = app_config['test']['osmapi']
    SQLALCHEMY_DATABASE_URI = database_uri.format(db_config['test']['user'],
                                                  db_config['test']['password'],
                                                  db_config['test']['host'],
                                                  db_config['test']['port'],
                                                  db_config['test']['database'])