Flask test in README uses django import

[steinnat]

When using the exmaple test I noticed this import:

from graphene_file_upload.django.testing import file_graphql_query

I could not find this import within the package.

[samirelanduk]

I am also having this problem. If you install graphene_django to be able to access this, you get a django.core.exceptions.ImproperlyConfigured error because there is no django app running.