How to use the puput.PUPUT_APPS function in puput

from puput import PUPUT_APPS

WAGTAIL_SITE_NAME = 'Puput blog'
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
SECRET_KEY = 'changemepliz'
DEBUG = True
ALLOWED_HOSTS = "*"

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
)
INSTALLED_APPS += PUPUT_APPS

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',
    'wagtail.core.middleware.SiteMiddleware',
    'wagtail.contrib.redirects.middleware.RedirectMiddleware',
)

ROOT_URLCONF = 'tests.testapp.urls'

TEMPLATES = [

PROJECT_APPS = ["wagtailmetadata"]

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "meta",
    "localsite",
] + PROJECT_APPS


INSTALLED_APPS += PUPUT_APPS

MIDDLEWARE_CLASSES = [
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    # 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
    # 'django.middleware.security.SecurityMiddleware',
    "wagtail.core.middleware.SiteMiddleware",
    "wagtail.contrib.redirects.middleware.RedirectMiddleware",
]

MIDDLEWARE = MIDDLEWARE_CLASSES