manage.py

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import environ
import os
import sys

from config.settings.base import BASE_DIR

env = environ.Env()
# reading .env file
environ.Env.read_env(os.path.join(BASE_DIR, 'config', '.env'))

def main():
    """Run administrative tasks."""
    environment = env("ENV")
    if environment == "local":
        os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings.local')
    elif environment == "travis":
        os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings.travis')
    elif environment == "production":
        os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings.production')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()