Re: [thredds] Java to Python tools

The important question is why you need Python.  If it's to access some C 
library with python bindings (e.g. numpy or netCDF4-python) then Jython isn't 
appropriate and you'll need one of those Python<->bridges JPype or Jepp.

If you need the very latest Python features (particularly Python 3) you'll also 
find Jython is a bit behind CPython.  Many standard Python frameworks now work 
with Jython (e.g. Django, SQLAlchemy) but you'd have to check the compatibility 
of each dependency.

Otherwise Jython is the most popular and well maintained choice.

Depending on your application you could also wire Java and Python together 
using inter-process communication.  There is a plethora of RPC libraries out 
there with good Python and Java support.  E.g. protocol buffers.

Stephen.

---
Stephen Pascoe  +44 (0)1235 445980
Centre of Environmental Data Archival
STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UK


-----Original Message-----
From: Robert Casey [mailto:rob@xxxxxxxxxxxxxxxxxxx] 
Sent: 04 April 2012 14:31
To: Pascoe, Stephen (STFC,RAL,RALSP); John Caron
Cc: netcdf-java@xxxxxxxxxxxxxxxx; thredds@xxxxxxxxxxxxxxxx
Subject: Re: [thredds] Java to Python tools


        Hi John-

        If you use Jython, it looks to be pretty seamless.  I am just  
starting to develop in Jython, so I can't claim experience in this  
department yet.  The first section of this page details Java within  
Jython.

        http://www.jython.org/jythonbook/en/1.0/JythonAndJavaIntegration.html

        -Rob


On Apr 4, 2012, at 1:02 AM, <stephen.pascoe@xxxxxxxxxx> wrote:

> Hi John,
>
> Direct experience beyond playing, no; but I've come across several  
> options:
>
> * Jpype  : http://sourceforge.net/project/jpype -- embeds a JVM in  
> Python
> * Jepp   : http://jepp.soureforge.net -- embeds Python interpreter  
> in Java
> * Jython : http://www.jython.org -- A Python implementation in the  
> JVM.
>
> I expect you want Jpype as in your case Python is doing the  
> wrapping.  I tested it out once and it worked for me.  The project  
> seems isn't exactly active but it still appears to be in use.
>
> Cheers,
> Stephen.
>
> ---
> Stephen Pascoe  +44 (0)1235 445980
> Centre of Environmental Data Archival
> STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11  
> 0QX, UK
>
>
> -----Original Message-----
> From: thredds-bounces@xxxxxxxxxxxxxxxx 
> [mailto:thredds-bounces@xxxxxxxxxxxxxxxx 
> ] On Behalf Of John Caron
> Sent: 04 April 2012 00:20
> To: Java NetCDF; THREDDS community
> Subject: [thredds] Java to Python tools
>
> Hi all:
>
> Anyone have experience with ways to wrap java in Python? We are  
> thinking
> about how to solve this issue again.
>
> John
>
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