Can I write parts of the Google App Engine code in Java, other parts in Python?

Question

Google App Engine supports both Python and Java application development.

Can I have both in the same application?

Answer 1

Can I run Java and Python code in the same app?

Each version of the app must specify a runtime language and it is possible to have version x of your app running Java, while version y is running Python. It would also be possible to use Jython.

Source: Google App Engine for Java FAQ

Answer 2

As far as I know, there are two ways:

• Write another app in java, publish it as a web services and call it from python (but that's not what you are looking for)
• Make a java application but write it in jython. Then your app will be written in python, it will run on JVM, and calls to java API are trivial.

Answer 3

Just to have an updated answer for this question,

From this answer on GAE google groups, it looks like it is possible to have different modules in different languages.