Hi Marc,
I updated Jython to 2.5.2, it was not that hard, updating the license
files took the most time.
I have a few of misgivings about Jython that might be good lessons for
Ptolemy and Kepler:
* Sadly, ptII/lib/jython.jar went from about 1Mb to 10Mb. Does this
mean that Jython-2.5.2 is 10 times better than Jython-2.2.1?
If jython is supposed to be a scripting language, then why is it so large?
This seems to be a common trend where nice small languages get more and
more features.
As an aside about Perl, see
Is Perl Better Than a Randomly Generated Programming Language? at
http://developers.slashdot.org/story/11/10/27/213231/is-perl-better-than-a-randomly-generated-programming-language
For comparison purposes, Ptolemy's ptsupport.jar is 3.5Mb and a
standalone Ptolemy demo including the GUI is 6.5Mb in jars.
Lesson: we need to keep an eye on code bloat and be able to deploy small
run times.
* Another issue with Jython-2.5.2 is that because they removed
org.python.core.PyJavaInstance some time after Jython-2.2.1, they should
have released Jython-2.5.2 as Jython-3.x. Most projects bump up the
major version number when there are incompatibilities.
Lesson: Ptolemy bumps up the major version number with each ~yearly
release. Ptolemy has backward compatibility filters. We do sometimes
remove old code, but only with major versions.
* The Jython license situation is a mess.
http://www.jython.org/license.html lists these licenses
- The Python Software Foundation License Version 2, which according to
Wikipedia is a BSD-style license
- The Jython-2.0 and 2.1 license, which is similar to a BSD-style license
- The JPython 1.1.x license, which is similar to BSD-style license
The software ships with these licenses in the LICENSE.txt file.
However, LICENSE_CPython.txt and LICENSE_Apache.txt are included. There
is no mention as to what code actually uses those licenses.
LICENSE_CPython.txt includes four copyrights:
- Python Software Foundation License Version 2
- BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
- CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
- CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
The last three look similar to BSD, but have various requirements.
I'll submit a bug report to Jython to get them to update their site.
Lesson: I'm not sure how Ptolemy and Kepler can avoid a similar
complexity issue. I've been working on updating our license file and
we have a way to determine what licenses are used by a particular
configuration.
http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII8.0/copyright.htm
lists 7 licenses used by Ptiny, a small configuration of Ptolemy II.
One of those 7 is the Jython-2.2.1 license, which is similar to the
Jython-2.5.2 license.
The Kepler configuration of Ptolemy II uses 15 licenses in the Ptolemy
II code.
_Christopher
On 11/5/11 9:15 AM, J. Marc Edwards wrote:
Christopher:
I suspect that I can simply code an entire actor extending the
respective classes directly in Jython.
That is what I am thinking. Please let me know what you think of this
strategy.
Of course, while I do this, I want to migrate a Kepler development
tree to use Jython 2.5.2, which I will need your assistance in completing.
Let's talk on the phone on Monday.
Regards, Marc
_J. Marc Edwards, Lead Architect_
/Semiconductor Design Portals/
*Nimbis Services, Inc.*
Cell - (919) 345-1021
Fax - (919) 882-8602
Skype - (919) 747-3775
[email protected]
[email protected]
*From:*Christopher Brooks [mailto:[email protected]]
*Sent:* Friday, November 04, 2011 9:00 PM
*To:* [email protected]
*Cc:* [email protected]
*Subject:* Re: [kepler-users] Python execution within the Kepler
Python actor...
Hi Marc,
On 11/4/11 2:09 PM, J. Marc Edwards wrote:
I need a little help in integrating my Jython/Python code into the
Python actor.
When I double-click on the Python actor in the PythonDialogExample, a
window with the Python code appears. I can of course edit the code
from within this window. However, I want to perform my code
development and editing from within my Eclipse environment from my
Kepler development build.
I don't know that much about Python, but I believe that you could use
the Python import facility to find imports.
I just added text to the Kepler Jython page about this, see:
https://kepler-project.org/developers/reference/python-and-kepler#how-jython-finds-imports
Note that I found a few other references on the web, included what
appears to be people who are using the full version of Python (not
Jython) with Kepler.
When I "open the actor", the beginning of the file has some Javadoc as
well as what appear to be some unmatched XML elements (<p>), along
with some matching XML element tags (</pre>) (does this correspond to
some pre-fire method?).
When you open the actor, you are seeing the Java code that implements
the PythonActor. The <p> tags are html tags used in the javadoc
comments of the Java file. All of the instances of the PythonActor
share the same Java code, but may have different Python code.
After this all of the Java code for the actor follows with the
standard initialize(), stop(), stopFire(), preinitialize(),
terminate(), etc, methods.
I do see in the Java code where there is a PythonScript method that
accepts a CompositeEntity where a script template is provided where I
am supposing a long Python string in the script.setExpression is defined.
However, what I would like to do is simply include my Jython module
within my Kepler build and debug my Jython code in connection with my
overall workflow.
Can someone tell me how to go about achieving this objective?
It looks like Jython uses sys.path to find imports. I included a
Ptolemy II model that opens in the devel version of Kepler that lists
the contents of sys.path. For further information about sys.path, see
http://jythonpodcast.hostjava.net/jythonbook/en/1.0/ModulesPackages.html
_Christopher
Thanks, Marc
--
J. Marc Edwards
Lead Architect - Semiconductor Design Portals
Nimbis Services, Inc.
Skype: (919) 747-3775
Cell: (919) 345-1021
Fax: (919) 882-8602
[email protected] <mailto:[email protected]>
www.nimbisservices.com <http://www.nimbisservices.com>
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--
Christopher Brooks, PMP University of California
CHESS Executive Director US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust Berkeley, CA 94720-1774
ph: 510.643.9841 (Office: 545Q Cory)
home: (F-Tu) 707.665.0131 cell: 707.332.0670
--
Christopher Brooks, PMP University of California
CHESS Executive Director US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust Berkeley, CA 94720-1774
ph: 510.643.9841 (Office: 545Q Cory)
home: (F-Tu) 707.665.0131 cell: 707.332.0670
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