Почему не могу достать переменную окружения с помощью env.str()?

Question

nishe @nishe

Django

Почему не могу достать переменную окружения с помощью env.str()?

в ALLOWED_HOSTS я пытаюсь достать переменную окружения с помощью модуля environ.
ALLOWED_HOSTS = env.str('ALLOWED_HOSTS')
При этом все остальные переменные легко ИЗВЛЕКАЮТСЯ!

Ошибка

File "/home/radma/Desktop/projects/django_projects/important_projects/bookstore/main/settings.py", line 32, in <module>
    ALLOWED_HOSTS = env.str('ALLOWED_HOSTS')
  File "/home/radma/Desktop/projects/django_projects/important_projects/bookstore/bookstore_venv/lib/python3.10/site-packages/environ/environ.py", line 213, in str
    value = self.get_value(var, cast=str, default=default)
  File "/home/radma/Desktop/projects/django_projects/important_projects/bookstore/bookstore_venv/lib/python3.10/site-packages/environ/environ.py", line 407, in get_value
    raise ImproperlyConfigured(error_msg) from exc
django.core.exceptions.ImproperlyConfigured: Set the ALLOWED_HOSTS environment variable

Файл окружения выглядит следующим образом:

SECRET_KEY=#sefesf
ENGINE=django.db.backends.postgresql_psycopg2
ALLOWED_HOSTS=localhost 127.0.0.1 
NAME=sef
USER=sef
PASSWORD=sef
HOST=sef
PORT=awd

settings.py выглядит следующим образом:

"""
Django settings for main project.

Generated by 'django-admin startproject' using Django 4.1.

For more information on this file, see
https://docs.djangoproject.com/en/4.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.1/ref/settings/
"""

from pathlib import Path
import environ
env = environ.Env()
environ.Env.read_env()


# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env.str('SECRET_KEY')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = env.str('ALLOWED_HOSTS')


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'books.apps.BooksConfig',
    'users.apps.UsersConfig',
    'crispy_forms'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'main.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'main.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.1/ref/settings/#databases

DATABASES = {
    'default':{
        'ENGINE': env.str('ENGINE'),
        'NAME': env.str('NAME'),
        'USER': env.str('USER'),
        'PASSWORD': env.str('PASSWORD'),
        'HOST': env.str('HOST'),
        'PORT': env.str('PORT'),
    }
}


# Password validation
# https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.1/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

AUTH_USER_MODEL = 'users.BookStoreUser'
LOGOUT_REDIRECT_URL = 'home'
LOGIN_REDIRECT_URL = 'home'

Что тут не так? Почему вылетает ошибка именно на эту строку и именно на то, что переменная якобы не создана?