Migrate media from django to S3 bucket

media_to_s3.py

"""
Simple way to re-upload files on django.

Using:
Django>1.9
django-storages>1.5
boto3
"""
from django.core.files import File
from my_package.models import ModelWithImage


for item in ModelWithImage.objects.all():
    filename = '%s_%s.png' % (item.title, item.id)
    try:
        with open('media/%s' % filename, 'r') as f:
            myfile = File(f)
            item.image = myfile
            item.save()
    except IOError, e:
        print filename, e