How to make pdf to image and and save that with instance when using django.

pdf_to_image.py

# https://github.com/Belval/pdf2image
# https://www.revsys.com/tidbits/loading-django-files-from-code/

import os
import tempfile

from django.core.files import File
from pdf2image import convert_from_path

from .models import CustomModel


custom_model = CustomModel.objects.get(pk=1)
pdf_path = 'pdf/path/file.pdf'

with tempfile.TemporaryDirectory() as path:
    image_path = convert_from_path(pdf_path, size=(500, None), fmt='jpeg', single_file=True,
                                   output_folder=path, paths_only=True)[0]
    cover_img_path = os.path.splitext(
        os.path.basename(custom_model.file.name))[0] + '.jpeg'
    custom_model.cover_img.save(cover_img_path, File(
        open(image_path, 'rb')), save=True)