Error adding to db?

Question

Django

The code should parse and add books to db

from requests import get
from bs4 import BeautifulSoup
from books.models import Book


for book_id in range(101724, 130000):
    try: 
        html = get('http://read.ru/book/{0}/'.format(book_id))
        b = BeautifulSoup(html.text, "html.parser")
        book_article = b.select('.book-article--title')[0].getText()
        book_description = b.select('.book-article--description p')[0].getText()
        text = "Book title: {0} Description: {1}".format(book_article, book_description)

        Book.objects.create(title=book_article, slug=slugify(book_article), description=book_description)
        print(text)
    except:
        print("Error")

I get an error: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
How to fix?