Is it possible to use Django 1.2 on Google App Engine?

I want to use the in operator in my Google App Engine project which was introduced in Django 1.2:

{% if "bc" in "abcdef" %}
  This appears since "bc" is a substring of "abcdef"
{% endif %}

I found out that is possible to use version 1.0 or 1.1on GAE, but nothing for 1.2. Is it possible?

Does Google App Engine support Django?

You can deploy a PostgreSQL or MySQL database that's managed and scaled by Google, and supported by Django. You can deploy Django with a Cloud Spanner backend using the python-spanner-django database backend.

It appears so, I found this - http://www.deck.cc/django_1.2_on_google_app_engine.html

You can bundle any version of Django with your application and deploy it.

Django 1.2.4 will almost certainly be included in the next release of App Engine; it's in the pre-release SDK 1.4.2 that was put out late last week. Assuming nothing goes horribly wrong, the prerelease features usually make it to the production site in a week or two.