Django: Programmatically saving image from URL to FileField or ImageField http://twigstechtips.blogspot.com/2012/04/django-programmatically-saving-image.html

gistfile1.py

class Product(models.Model):
  # other fields
  image = models.FileField(storage = MogileFSStorage(), upload_to = 'product_images') 

from django.core.files import File
from django.core.files.temp import NamedTemporaryFile

product = Product()
# set all your variables here
product.save()

# Save image
image_url = 'http://whatever.com/image.jpg'
img_temp = NamedTemporaryFile(delete = True)
img_temp.write(urlopen(image_url).read())
img_temp.flush()

product.image.save("image_%s" % product.pk, File(img_temp))
product.save()