__init__.py

'''
platform_data_api/settings/__init__.py
--------------------------------------

Reads the environment and configures all the things
'''
from load_conf import config

ENV = ENVIRONMENT = config['env']

if ENV == 'production':
    from settings.prod import *
elif ENV == 'stage':
    from settings.stage import *
else:
    from settings.dev import *

load_conf.py

'''
${project}/settings/load_conf.py
---------------------------------------

'''
import os
import json


current_directory = os.path.dirname(os.path.realpath(__file__))
possible_file_paths = [
    os.path.join(current_directory, 'local_settings.json'),
    '/buzzfeed/local/conf/platform_data_api_conf.json'
]

config = None
for file_path in possible_file_paths:
    if not os.path.isfile(file_path):
        continue

    with open(file_path, 'r') as f:
        file_data = f.read()
        config = json.loads(file_data)
        break

if not config:
    raise SystemError('Invalid or missing config file')

is_empty = lambda s: None if s == '' else s
config = {k: is_empty(config[k]) for k in config}