Passing array from java to python

[loial]

I need to pass some sort of array or hashmap from Java and read the
data in a python script (which will be called by the java class). Is
there any neater way to do this other than just passing strings?

 

[Chris Rebert]

I need to pass some sort of array or hashmap from Java and read the
data in a python script (which will be called by the java class). Is
there any neater way  to do this other than just passing strings?

Jython?: http://www.jython.org/

Or depending on how you define "just passing strings", JSON:
http://json.org/
http://docs.python.org/library/json.html

Cheers,
Chris

 

[loial]

Unfortunately using jpython or json are not options at the moment

 

[Chris Rebert]

Unfortunately using jpython or json are not options at the moment

What rules out JSON that does not also rule out the "just passing
strings" approach?

What about (*shudder*) XML? (Can't believe I just said that...)

Cheers,
Chris

 

[Ian Kelly]

Unfortunately using jpython or json are not options at the moment

How about JPype? Or do the Java and Python need to be in separate processes?

 

[Marco Nawijn]

I need to pass some sort of array or hashmap from Java and read the
data in a python script (which will be called by the java class). Is
there any neater way  to do this other than just passing strings?

I recently had to deal with the same problem, some bi-directional
communication between Java and Python. Several options were discussed
between me and my fellow programmer. In the end we settled for XML-
rpc. It works remarkably well in our case. We use it to pass test and
simulation data to GUI code. XML-rpc is very well supported in python.
Basic types (lists, dicts etc.) are encoded automatically. If the
arrays are very large, I would probably use an intermediate database
(e.g. Hdf5) for storage and then use some sort of messaging to inform
the Java code of any changes.