jython-users — Discussion of and questions about using Jython

[Jython-users] Using xml.parsers.expat

[Mr <mro...@us...>]

How can I use xml.parsers.expat on a Mac?
I tried

 import xml.parsers.expat

How can I get expat for the Mac?=20
 I don't have code warrior c compiler.

Mr

RE: [Jython-users] Trouble with 'os' package

[Sells, F. <fr...@ad...>]

I'm having similar problem with importing my own package.

see thread on jythonc debug help

no solution yet.

-----Original Message-----
From: Peter Brinkmann [mailto:bri...@ma...]
Sent: Tuesday, August 07, 2001 1:46 AM
To: jyt...@li...
Subject: [Jython-users] Trouble with 'os' package



Hi!
I've got some jython code that works fine when run with jython but
breaks down when compiled and run with java. Here's the message I'm
seeing.

> Java Traceback:
> 
> 	at org.python.core.Py.JavaError(Py.java, Compiled Code)
> 	at org.python.core.PyTableCode.call(PyTableCode.java, Compiled Code)
> 	at org.python.core.imp.createFromCode(imp.java, Compiled Code)
> 	at org.python.core.imp.createFromClass(imp.java, Compiled Code)
> 	at org.python.core.imp.loadPrecompiled(imp.java, Compiled Code)
> 	at org.python.core.imp.loadFromPath(imp.java, Compiled Code)
> 	at org.python.core.imp.loadFromPath(imp.java, Compiled Code)
> 	at org.python.core.imp.load(imp.java, Compiled Code)
> 	at org.python.core.imp.load(imp.java, Compiled Code)
> 	at org.python.core.imp.importName(imp.java, Compiled Code)
> 	at org.python.core.imp.importName(imp.java, Compiled Code)
> 	at org.python.core.ImportFunction.load(__builtin__.java, Compiled
Code)
> 	at org.python.core.ImportFunction.__call__(__builtin__.java,
Compiled Code)
> 	at org.python.core.PyObject.__call__(PyObject.java, Compiled Code)
> 	at org.python.core.__builtin__.__import__(__builtin__.java, Compiled
Code)
> 	at org.python.core.imp.importFromAs(imp.java, Compiled Code)
> 	at pbj.jpy.pbjgraph$_PyInner.main$35(pbjgraph.java, Compiled Code)
> [...]
> Traceback (innermost last):
>   File "/home/brinkman/prog/java/train/pbjp/pbjgraph.py", line 0, in main
>   File "/home/brinkman/prog/java/gumbie/MenuMaker.py", line 0, in main
> java.lang.ExceptionInInitializerError: java.lang.NullPointerException
> 

I've narrowed it down to trouble with the 'os' package. It appears that
I can import it without trouble, but any attempt to use it (e.g., use
'os.curdir' or 'os.path.join') causes an exception like the one above.
Any ideas?
Thanks,
	Peter


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[Jython-users] Fwd: multi thread

[Silvio A. <sar...@mo...>]

Ok, I just realized that Python language supports multi thread programs:)
I was so concentrated on extensions and Python API that I didn't even think 
looking in the *library* manual.
sorry for having bothered you!:)

Silvio.

[Jython-users] multi thread

[Silvio A. <sar...@mo...>]

Hello everybody!
I'm new to this list: my name is Silvio, I am Italian and I'm currently 
working in France.
I discovered Python and Jython just two weeks ago: I am using Python to 
test the APIs of a server platform (CPython for the C API and Jython for 
the Java one).
By now I always found a way to use the same scripts for both CPython and 
Jython (developing the CPython extension module to emulate the behavior of 
the Java API).
Now I should implement some multi thread tests, but I saw that Python 
language doesn't support multi thread (at least from what I understood).
The only way i could think of for doing it is embedding CPython in a C 
program that handles the threads using the Python API, and embedding Jython 
into a Java program that does the same (would it work?).
This would lead to very different ways of implementing the tests for the 
two APIs.
Is there any simplest way?

bye,
Silvio.

[Jython-users] Trouble with 'os' package

[Peter B. <bri...@ma...>]

Hi!
I've got some jython code that works fine when run with jython but
breaks down when compiled and run with java. Here's the message I'm
seeing.

> Java Traceback:
> 
> 	at org.python.core.Py.JavaError(Py.java, Compiled Code)
> 	at org.python.core.PyTableCode.call(PyTableCode.java, Compiled Code)
> 	at org.python.core.imp.createFromCode(imp.java, Compiled Code)
> 	at org.python.core.imp.createFromClass(imp.java, Compiled Code)
> 	at org.python.core.imp.loadPrecompiled(imp.java, Compiled Code)
> 	at org.python.core.imp.loadFromPath(imp.java, Compiled Code)
> 	at org.python.core.imp.loadFromPath(imp.java, Compiled Code)
> 	at org.python.core.imp.load(imp.java, Compiled Code)
> 	at org.python.core.imp.load(imp.java, Compiled Code)
> 	at org.python.core.imp.importName(imp.java, Compiled Code)
> 	at org.python.core.imp.importName(imp.java, Compiled Code)
> 	at org.python.core.ImportFunction.load(__builtin__.java, Compiled Code)
> 	at org.python.core.ImportFunction.__call__(__builtin__.java, Compiled Code)
> 	at org.python.core.PyObject.__call__(PyObject.java, Compiled Code)
> 	at org.python.core.__builtin__.__import__(__builtin__.java, Compiled Code)
> 	at org.python.core.imp.importFromAs(imp.java, Compiled Code)
> 	at pbj.jpy.pbjgraph$_PyInner.main$35(pbjgraph.java, Compiled Code)
> [...]
> Traceback (innermost last):
>   File "/home/brinkman/prog/java/train/pbjp/pbjgraph.py", line 0, in main
>   File "/home/brinkman/prog/java/gumbie/MenuMaker.py", line 0, in main
> java.lang.ExceptionInInitializerError: java.lang.NullPointerException
> 

I've narrowed it down to trouble with the 'os' package. It appears that
I can import it without trouble, but any attempt to use it (e.g., use
'os.curdir' or 'os.path.join') causes an exception like the one above.
Any ideas?
Thanks,
	Peter

RE: [Jython-users] jythonc debug help

[O'Brien-Strain, E. <eo...@ex...>]

One way to "touch" an existing file in jython is to use the standard Java
API as follows:

  from java.util import Date
  from java.io import File

  now = Date().time
  File(pathname).setLastModified(now)

_
Eamonn O'Brien-Strain
eo...@hp...
HP Labs

> -----Original Message-----
> [...] To "touch" a file use os.utime, as in:
> 
> now = time.time()
> os.utime(pathname, (now, now))
> 
> Not in Jython, though.

Re: [Jython-users] Running JythonServlet on tomcat....

[Mats W. <ma...@la...>]

 >Each time I started tomcat and my jython servlet, the package manager
 >reported about new jar files,  although they were already recognized during
 >previous starts. The package manager creates each time a new file in the
 >cachedir: myjar.pkc, myjar$1.pkc, myjar$2.pkc, ... This happens also to
 >jython.jar (jython.pkc, jython$1.pkc, ...).


I just observed something ?perhaps? similar which has nothing
to do with Tomcat...

I don't use Jython much for "embedding", but I just tried out
one of my examples on 2.1a3, and found that (after I fixed the
idiot user error that didn't have the correct Jython .jar
file in the CLASSPATH) that the package manager ran again,
so I have two versions of i18n, rt and sunrasign, as in:

i18n.pkc      i18n$1.pkc
rt.pkc        rt$1.pkc
sunrasign.pkc sunrasign$1.pkc

There is /not/ a dup of jython.pkc.

Don't remember this happening before....

(system details, if it matters: Win2000 SP2, Sun Java 1.3.1)

Mats

Re: [Jython-users] I don't get this..: Newbie

[<bc...@wo...>]

On Thu, 26 Jul 2001 14:13:57 +0200 (CEST), you wrote:

>Regarding my previous post. I found and applyed the fix for the "Py Meta
>Class Bug". Lo and behold the applet runs.
>Now I get an error then exceuting the pageHandler function:
>"LookupError: no codec search functions registered: can't find encoding"

The urllib uses an encoding called "ASCII". Jython 2.1a3 only supports
the name "ascii" as a builtin encoding. This particular problem will be
fixed in 2.1b1.

As a workaround in 2.1a3 you can add this line to the beginning of the
script:

import encodings.ascii

Thank you for reporting this.

regards,
finn

RE: [Jython-users] jythonc debug help

[Mats W. <ma...@la...>]

At 12:47 PM 8/6/2001 -0400, you wrote:
 >I tried your suggestions with no impact.  I was not able to "touch" the .py
 >files since I am on W2k and do not know the equivalent command, it there is
 >one.

A little Python can take care of the touch part.  To "touch" a file
use os.utime, as in:

now = time.time()
os.utime(pathname, (now, now))

Not in Jython, though.

Mats

Re: [Jython-users] jythonc debug help

[<bc...@wo...>]

[Fred Sells]

>I have a jar file that I developed in java1.3 using JBuilder and the
>compiler provided with it (I assume jdk 1.3).  When I import that file while
>running jython, all is well HOWEVER when I jythonc my main (using --all
>--jar Main.py) and run it -- I can import the package but it does not have
>any visible contents.
>
>i.e.
>
>import ezjava
>print dir(ezjava)
>
>["__name__"]  is all I get
>
>the classes in ezjava are all public; I'm stumped.

You would get the same result if you use tried it on any other java
package. It isn't a problem with your ezjava.jar file.

If you want to use dynamic reflection in a staticly compiled program you
can try adding code like this somewhere in your Main.py file:

if 1 == 0:
    from ezjava import *

It doesn't have to executed as long as the compiler can see the code.
Also look for the text 

  Required packages:
    ezjava*

in the jythonc output. 

regards,
finn

[Jython-users] Re: [Jython-dev] How can I use Mysql under jython ?

[Robert W. B. <rb...@di...>]

*Moved to Jython-users

On Tue, 7 Aug 2001, syKim wrote:
> Hello
>
> I am trying web program with jython..
>
> It have to use database. and, I tried mysql..
>
> in python, Mysql-python module exist (a kind of plug-in module)
>
> but, it is just occasion of Cpython..
>
> How can I use Mysql under jython?  Is it possible?

Oh yes, it is possible.

You get to choose using JDBC directly or the wonderful Python DB API 2.0
zxjdbc package. I use zxJDBC mostly now because of the convenience it
offers (tnx Brian!). Check it out at www.ziclix.com/zxjdbc

You do need the java jdbc driver. It is available at www.mysql.org (click
on "downloads" then "Contributed software"). Look for the
mm.mysql.jdbc-0.6.tar.gz package- it's the java jdbc driver you want.


using JDBC is as simple as below (untested though, there's probably a
typo):

>>> import java
>>> java.lang.Class.forName("org.gjt.mm.mysql.Driver")
>>> con = java.sql.DriverManager.getConnection(
             "jdbc:mysql://host/database","username","passwd");

>>> Stmt = con.createStatement();
>>> rs = Stmt.executeQuery("SELECT * from sometable");
>>>
>>> while (rs.next()): print rs.getString("field")

zxJDBC usage is best gotten from the nice documentation that comes with
it. The examples Brian includes with zxJDBC are specific to mysql- I'm
sure you will find them most helpful
(www.ziclix.com/zxjdbc/documentation.html).

Don't hesitate with future questions- there's a horde of database gurus
that lurk about in this list :)

Cheers,
Robert

RE: [Jython-users] jythonc debug help

[Sells, F. <fr...@ad...>]

I tried your suggestions with no impact.  I was not able to "touch" the .py
files since I am on W2k and do not know the equivalent command, it there is
one.

I notice that my ezjava.jar manifest does not define any of the classes in
the file.  Other's who know java but not jython indicate that could be the
culprit.  

So far, I've not found any useful information on the manifest, but am
continuing to search.

any ideas?????????



-----Original Message-----
From: John Mudd [mailto:joh...@ya...]
Sent: Friday, August 03, 2001 2:29 PM
To: Sells, Fred; Jyt...@li...
Cc: 'fr...@su...'
Subject: Re: [Jython-users] jythonc debug help


The traceback is always line 0.  Yes, that's normal unfortunately.

Build problem?  Here are the rules that I follow:

Build jar files using jythonc:
(+) Set CLASSPATH for running even when just compiling.
(+) Add jython.jar to CLASSPATH while compiling!
    export CLASSPATH=$CLASSPATH:/home/mudd/jython-2.1a1/jython.jar
(+) rm *class; rm <target>.jar; rm -rf jpywork; touch *py
(+) jythonc -all --package com.proj.test --jar testRepo.jar
$(JYTHONSRCS)        <------ With --all, no jython jar needed to run.
(+) Run again if get "too many files" error.




--- "Sells, Fred" <fr...@ad...> wrote:
> I have a fairly large application that runs fine under jython.
> 
> When I try to run it as a jar file, doing
> 
> >jythonc --core --deep --jar xxx.jar Main.py
> 
> >java -jar xxx.jar
> 
> I get a null pointer exception and the python style traceback is
> always line
> 0
> 
> I'm using jython20, jdk1.3 and JBuilder 4's JDBC classes.  Is there
> any way
> to get better info other than disabling sections of code until I
> isolate the
> offending section.
> 
> tia
> 
> Fred
> 
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> http://lists.sourceforge.net/lists/listinfo/jython-users


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[Jython-users] Saving the state of a Jython interpreter to a stream

[Adrian S. J. <as...@pa...>]

Hi,

Is there any simple way of saving the complete state of a Jython
interpreter to a stream?

I understand that Pickles don't save the implementation, just the
data.

To complicate things further, I have several interpreters running
in the same process and they share objects and classes between
them.

My first attempt has been to Serialize the dictionaries, but it
breaks with a NotSerializableException because the PythonInterpreter
isn't serializeable.

Is it likely to break anything if I just make it serializeable?

Thanks,

Adrian.

--
Adrian St. John  -  as...@pa...
Pan Security International

[Jython-users] Running JythonServlet on tomcat: package manager reports strange things

[Waclawczyk J. <Jan...@ic...>]

Hi,

I  installed and ran JythonSerlvet on tomcat3.2.3 and with jython-2.1a2 as described at http://jywiki.sourceforge.net/index.php?JythonServlet. 
The first example hello.py works fine !

Then I tried to copy my jar files to the directory <context>/WEB-INF/lib and use them within my jython servlet scripts (i.e. I import java classes in these scripts)  but it didn't function: the package manager reported about all these new jar files, but that's all: when running script I got exception: ClassNotFoundException for classes included in those jar files.

Each time I started tomcat and my jython servlet, the package manager reported about new jar files,  although they were already recognized during previous starts. The package manager creates each time a new file in the cachedir: myjar.pkc, myjar$1.pkc, myjar$2.pkc, ... This happens also to jython.jar (jython.pkc, jython$1.pkc, ...).

I placed then all the jar files in the CLASSPATH before running tomcat and all my servlet scripts worked fine !

What's wrong ?
Regards,  Janusz Waclawczyk

Re: [Jython-users] Jython on iPAQ

[Stuart S. <st...@me...>]

I ran pystone under Jython with
>>>execfile(".../pystone.py");

on my iPAQ, and got
time=90.852
110.069 Pystone

but I'm using SaveJe XE (0.1.1 beta, see www.savaje.com), and Java 1.3.0
(Jython 2.0), on the 3635.

Interestingly enough, Jython is apparently the only development environment
currently available within SavaJe XE (on the iPAQ and NetBook platforms).
It will run compiled Java 2 SE applications (has a JRE), but there is no
compiler (JDK).
Just my handy dandy Jython interpreter... (thank you Finn!)

Stuart


Brian Zhou wrote:

> If you got standard Python 2.1.1, copy lib/test/__init__.py to your jython
> directory. This makes all files under test/ available as modules. If you
> don't, it's actually a dummy one-line file, so I think touch a new one will
> do too:
>
>     # Dummy file to make this directory a package.
>
> Then, from J9 Console
>
> Jython 2.1a3 on java1.2.2 subset (JIT: null)
> Type "copyright", "credits" or "license" for more information.
> >>> from test import pystone
> >>> pystone.main()
> Pystone(1.1) time for 10000 passes = 205.544
> This machine benchmarks at 48.6514 pystones/second
> >>
>
> Hope your iPaq is faster than mine ;-)
>
> -Brian

Re: [Jython-users] Jython on iPAQ

[Brian Z. <bri...@ya...>]

If you got standard Python 2.1.1, copy lib/test/__init__.py to your jython
directory. This makes all files under test/ available as modules. If you
don't, it's actually a dummy one-line file, so I think touch a new one will
do too:

    # Dummy file to make this directory a package.

Then, from J9 Console

Jython 2.1a3 on java1.2.2 subset (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> from test import pystone
>>> pystone.main()
Pystone(1.1) time for 10000 passes = 205.544
This machine benchmarks at 48.6514 pystones/second
>>

Hope your iPaq is faster than mine ;-)

-Brian

----- Original Message -----
From: "Ted Shab" <ts...@ya...>
To: <jyt...@li...>
Sent: Friday, August 03, 2001 12:10 PM
Subject: [Jython-users] Jython on iPAQ


> j9 examples run fine, but I can't import pystone.
>
> Here is my shortcut -
> 119#"\vame1.3\j9.exe" "-bp:\vame1.3\classes.zip"
> "-cp:\JRE1.1\lib\rt.jar;\jython-2.1a3\jython.jar"
> "org.python.util.jython"
>
> I used the largest classes.zip from the vame
> distribution.
>
> Any ideas?
>
> Also - has anyone gotten AWT working from jython on
> the iPAQ?
>
> Best,
>
> Ted
>
> > Steps involved:
> > ===========
> >
> > 1. download from http://www.embedded.oti.com/ and
> > install j9 to pocketpc
> > \vame1.3, make sure you can run the demos
> > 2. download jython2.1a1 from http://www.jython.org ,
> > copy \jython-2.1a1 to
> > pocketpc \jython-2.1a1
> > 3. copy Sun's JRE1.1.8 files from "C:\Program
> > Files\JavaSoft\JRE\1.1" to
> > pocketpc \JRE1.1
> > 4. create a shortcut RunJython.lnk using the
> > following
> > 4 lines concated (on
> > a single line seperated by " ") on your desktop PC
> > and
> > copy it to
> > \jython-2.1a1:
> > 119#"\vame1.3\j9.exe"
> >  "-bp:\vame1.3\classes.zip"
> >  "-cp:\JRE1.1\lib\rt.jar;\jython-2.1a1\jython.jar"
> >  "org.python.util.jython"
> >
> > Sample session:
> > ===============
> > Jython 2.1a1 on java1.2.2 subset (JIT: null)
> > Type "copyright", "credits" or "license" for more
> > information.
> > >>> import java
> > >>> print java.util.Date()
> > Mon Jun 18 23:15:28 PDT 2001
> > >>> import pystone
> > >>> pystone.main()
> > Pystone(1.1) time for 10000 passes = 202.265
> > This machine benchmarks at 49.4401 pystones/second
> > >>>
> >
> >
> > Wish:
> > =====
> > 0. it's still too slow;
> > 1. J9 Console gets updated so that it complies to
> > latest pocketpc UI
> > standard (right now the menubar is on the bottom,
> > and
> > the input text field
> > gets blocked by the tiny keyboard);
> > 2. We can do without rt.jar. I tried to put
> > classes.zip into classpath but
> > it does not work; without rt.jar jython cannot
> > "import
> > java". Any other
> > idea?
> >
> > Congrats to the J9 team and the jython team!
> >
> > -Brian
> >
> > Just got myself an iPaq 3670, and tried Sun's
> > Personal
> > Java
> >
> http://developer.java.sun.com/developer/earlyAccess/personaljava/
> > on it, it
> > runs okay. This is basicly a Java1.1 runtime without
> > Swing, but awt and JNI
> > is supported.
> >
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Make international calls for as low as $.04/minute
> > with Yahoo! Messenger
> > http://phonecard.yahoo.com/
>
>
>
> __________________________________________________
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> Make international calls for as low as $.04/minute with Yahoo! Messenger
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>
> _______________________________________________
> Jython-users mailing list
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> http://lists.sourceforge.net/lists/listinfo/jython-users
>

Re: [Jython-users] jythonc debug help

[Fred S. <fr...@su...>]

I'll give the hints below a try, meanwhile I've isolated the problem better.

I have a jar file that I developed in java1.3 using JBuilder and the
compiler provided with it (I assume jdk 1.3).  When I import that file while
running jython, all is well HOWEVER when I jythonc my main (using --all
--jar Main.py) and run it -- I can import the package but it does not have
any visible contents.

i.e.

import ezjava
print dir(ezjava)

["__name__"]  is all I get

the classes in ezjava are all public; I'm stumped.

John Mudd wrote:

> The traceback is always line 0.  Yes, that's normal unfortunately.
>
> Build problem?  Here are the rules that I follow:
>
> Build jar files using jythonc:
> (+) Set CLASSPATH for running even when just compiling.
> (+) Add jython.jar to CLASSPATH while compiling!
>     export CLASSPATH=$CLASSPATH:/home/mudd/jython-2.1a1/jython.jar
> (+) rm *class; rm <target>.jar; rm -rf jpywork; touch *py
> (+) jythonc -all --package com.proj.test --jar testRepo.jar
> $(JYTHONSRCS)        <------ With --all, no jython jar needed to run.
> (+) Run again if get "too many files" error.
>
> --- "Sells, Fred" <fr...@ad...> wrote:
> > I have a fairly large application that runs fine under jython.
> >
> > When I try to run it as a jar file, doing
> >
> > >jythonc --core --deep --jar xxx.jar Main.py
> >
> > >java -jar xxx.jar
> >
> > I get a null pointer exception and the python style traceback is
> > always line
> > 0
> >
> > I'm using jython20, jdk1.3 and JBuilder 4's JDBC classes.  Is there
> > any way
> > to get better info other than disabling sections of code until I
> > isolate the
> > offending section.
> >
> > tia
> >
> > Fred
> >
> > _______________________________________________
> > Jython-users mailing list
> > Jyt...@li...
> > http://lists.sourceforge.net/lists/listinfo/jython-users
>
> __________________________________________________
> Do You Yahoo!?
> Make international calls for as low as $.04/minute with Yahoo! Messenger
> http://phonecard.yahoo.com/

[Jython-users] Jython on iPAQ

[Ted S. <ts...@ya...>]

j9 examples run fine, but I can't import pystone.

Here is my shortcut - 
119#"\vame1.3\j9.exe" "-bp:\vame1.3\classes.zip"
"-cp:\JRE1.1\lib\rt.jar;\jython-2.1a3\jython.jar"
"org.python.util.jython"

I used the largest classes.zip from the vame
distribution.  

Any ideas?

Also - has anyone gotten AWT working from jython on
the iPAQ?

Best,

Ted
  
> Steps involved:
> ===========
> 
> 1. download from http://www.embedded.oti.com/ and
> install j9 to pocketpc
> \vame1.3, make sure you can run the demos
> 2. download jython2.1a1 from http://www.jython.org ,
> copy \jython-2.1a1 to
> pocketpc \jython-2.1a1
> 3. copy Sun's JRE1.1.8 files from "C:\Program
> Files\JavaSoft\JRE\1.1" to
> pocketpc \JRE1.1
> 4. create a shortcut RunJython.lnk using the
> following
> 4 lines concated (on
> a single line seperated by " ") on your desktop PC
> and
> copy it to
> \jython-2.1a1:
> 119#"\vame1.3\j9.exe"
>  "-bp:\vame1.3\classes.zip"
>  "-cp:\JRE1.1\lib\rt.jar;\jython-2.1a1\jython.jar"
>  "org.python.util.jython"
> 
> Sample session:
> ===============
> Jython 2.1a1 on java1.2.2 subset (JIT: null)
> Type "copyright", "credits" or "license" for more
> information.
> >>> import java 
> >>> print java.util.Date() 
> Mon Jun 18 23:15:28 PDT 2001
> >>> import pystone 
> >>> pystone.main() 
> Pystone(1.1) time for 10000 passes = 202.265
> This machine benchmarks at 49.4401 pystones/second
> >>> 
> 
> 
> Wish:
> =====
> 0. it's still too slow;
> 1. J9 Console gets updated so that it complies to
> latest pocketpc UI
> standard (right now the menubar is on the bottom,
> and
> the input text field
> gets blocked by the tiny keyboard);
> 2. We can do without rt.jar. I tried to put
> classes.zip into classpath but
> it does not work; without rt.jar jython cannot
> "import
> java". Any other
> idea?
> 
> Congrats to the J9 team and the jython team!
> 
> -Brian
> 
> Just got myself an iPaq 3670, and tried Sun's
> Personal
> Java
>
http://developer.java.sun.com/developer/earlyAccess/personaljava/
> on it, it
> runs okay. This is basicly a Java1.1 runtime without
> Swing, but awt and JNI
> is supported.
> 
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Make international calls for as low as $.04/minute
> with Yahoo! Messenger
> http://phonecard.yahoo.com/



__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

Re: [Jython-users] jythonc debug help

[John M. <joh...@ya...>]

The traceback is always line 0.  Yes, that's normal unfortunately.

Build problem?  Here are the rules that I follow:

Build jar files using jythonc:
(+) Set CLASSPATH for running even when just compiling.
(+) Add jython.jar to CLASSPATH while compiling!
    export CLASSPATH=$CLASSPATH:/home/mudd/jython-2.1a1/jython.jar
(+) rm *class; rm <target>.jar; rm -rf jpywork; touch *py
(+) jythonc -all --package com.proj.test --jar testRepo.jar
$(JYTHONSRCS)        <------ With --all, no jython jar needed to run.
(+) Run again if get "too many files" error.




--- "Sells, Fred" <fr...@ad...> wrote:
> I have a fairly large application that runs fine under jython.
> 
> When I try to run it as a jar file, doing
> 
> >jythonc --core --deep --jar xxx.jar Main.py
> 
> >java -jar xxx.jar
> 
> I get a null pointer exception and the python style traceback is
> always line
> 0
> 
> I'm using jython20, jdk1.3 and JBuilder 4's JDBC classes.  Is there
> any way
> to get better info other than disabling sections of code until I
> isolate the
> offending section.
> 
> tia
> 
> Fred
> 
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> http://lists.sourceforge.net/lists/listinfo/jython-users


__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

[Jython-users] jythonc debug help

[Sells, F. <fr...@ad...>]

I have a fairly large application that runs fine under jython.

When I try to run it as a jar file, doing

>jythonc --core --deep --jar xxx.jar Main.py

>java -jar xxx.jar

I get a null pointer exception and the python style traceback is always line
0

I'm using jython20, jdk1.3 and JBuilder 4's JDBC classes.  Is there any way
to get better info other than disabling sections of code until I isolate the
offending section.

tia

Fred

[Jython-users] Q: Package Manager in jpython/jython

[Liu, J. (C-BASS) <Jes...@c-...>]

I am running multiple processes using jython2.0 in NFS. These processes may
have different python paths but use the same cache dir and access the same
files there. Is there any danger these processes will clobber each other and
produce unpredictable results, i.e. using a wrong package? What exactly
would a Package Manager do in this case? Thanks.

Jesse Liu

AW: AW: AW: AW: [Jython-users] Import doesn't work (perfectly - but it does!)

[Joern E. <Joe...@mi...>]

Hi again

> I've attached the log-file, the script and my version of string.py 
(please see attached file.zip) ...

... but obviously I cannot send any kind of files through a mailing-list. 
For anybody who's interested here the files as stated:

The script

# ---------- start of script
import java
java.lang.System.getProperty("python.home")
java.lang.System.getProperty("python.path")

import sys
sys.path.append("c:\\program files\\jython")
sys.path.append("c:\\program files\\jython\\lib")

print "python.home: ",java.lang.System.getProperty("python.home")
print "python.path: ",java.lang.System.getProperty("python.path")
print "sys.path: ",sys.path
print "sys.prefix: ",sys.prefix

# Import support for strings
import string

# Get the value of the scalar node
value = scriptinterface.getNodeValue(".1.3.6.1.4...")

# Convert value to INT
valueAsInt=string.atoi(value)
#valueAsInt=eval(value)

# Add 1 to value
valueAsInt=valueAsInt+1

# Set a limit of 8 for value
if valueAsInt > 8:
	valueAsInt=1

# Convert valueAsInt back to string
value=str(valueAsInt)

# Write back (increased) value to node
scriptinterface.updateValue(".1.3.6.1.4...",value,"CONST")
# ---------- end of script





The log-file:

Time stamp :Mon Jul 30 11:15:58 GMT+02:00 2001

The command executed : python.home:  None

python.path:  None
sys.path:  ['.\\jars\\Lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib']
sys.prefix:  .\jars\
Traceback (innermost last):
  File 
"D:\AdventNet\simulator\mibs\_behavior_scripts_\counter_with_import.py", 
line 17, in ?
  File "C:\Program Files\Jython\Lib\string.py", line 418, in ?
java.lang.NoSuchMethodError

	at string$py.f$0(C:\Program Files\Jython\Lib\string.py)

	at string$py.call_function(C:\Program Files\Jython\Lib\string.py)

	at org.python.core.PyTableCode.call(PyTableCode.java:155)

	at org.python.core.imp.createFromCode(imp.java:150)

	at org.python.core.imp.createFromPyClass(imp.java:70)

	at org.python.core.imp.loadFromPath(imp.java:283)

	at org.python.core.imp.loadFromPath(imp.java:227)

	at org.python.core.imp.load(imp.java:343)

	at org.python.core.imp.load(imp.java:362)

	at org.python.core.imp.importName(imp.java:417)

	at org.python.core.imp.importName(imp.java:444)

	at org.python.core.imp.importOne(imp.java:448)

	at 
org.python.pycode._pyx0.f$0(D:\AdventNet\simulator\mibs\_behavior_script  
s_\counter_with_import.py)

	at 
org.python.pycode._pyx0.call_function(D:\AdventNet\simulator\mibs\_behav  
ior_scripts_\counter_with_import.py)

	at org.python.core.PyTableCode.call(PyTableCode.java:155)

	at org.python.core.Py.runCode(Py.java:937)

	at org.python.core.__builtin__.execfile(__builtin__.java:273)

	at org.python.core.__builtin__.execfile(__builtin__.java:277)

	at org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:131)

	at 
com.adventnet.snmp.simulator.agent.PyInterpreter.executeScript(PyInterpr  
eter.java:253)

	at com.adventnet.snmp.simulator.agent.XMLHandler.processScalarScript(XM  
LHandler.java:2089)

	at 
com.adventnet.snmp.simulator.agent.XMLHandler.processGetRequest(XMLHandl  
er.java:420)

	at 
com.adventnet.snmp.simulator.agent.RegObject.processGetRequest(RegObject  
.java:604)

	at 
com.adventnet.snmp.simulator.agent.RegObject.getRequest(RegObject.java:364)

	at 
com.adventnet.snmp.snmp2.agent.VarBindRequestListenerHolder.processGetVa  
rBinds(VarBindRequestListenerHolder.java:736)

	at 
com.adventnet.snmp.snmp2.agent.PduRequestHandler.processGetReqMesg(PduRe  
questHandler.java:775)

Exception while executing the Python Script
	at 
com.adventnet.snmp.snmp2.agent.PduRequestHandler.getRequest(PduRequestHa  
ndler.java:682)

	at 
com.adventnet.snmp.snmp2.agent.PduRequestHandler.processSnmpPduRequest(P  
duRequestHandler.java:335)

	at com.adventnet.snmp.snmp2.agent.SnmpAgent.callback(SnmpAgent.java:770)

	at com.adventnet.snmp.snmp2.SnmpSession.processPacket(SnmpSession.java:  
2342)

	at 
com.adventnet.snmp.snmp2.SnmpCallback.processPacket(SnmpCallback.java:240)

	at com.adventnet.snmp.snmp2.SnmpCallback.run(SnmpCallback.java:119)


java.lang.NoSuchMethodError: java.lang.NoSuchMethodError
python.home:  None
python.path:  None
sys.path:  ['.\\jars\\Lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib']
sys.prefix:  .\jars\
python.home:  None
python.path:  None
sys.path:  ['.\\jars\\Lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib', 'c:\\program files\\jython', 'c:\\program 
files\\jython\\lib']
sys.prefix:  .\jars\




The concerned lines from string.py:

...
# Try importing optional built-in module "strop" -- if it exists,
# it redefines some string operations that are 100-1000 times faster.
# It also defines values for whitespace, lowercase and uppercase
# that match <ctype.h>'s definitions.

try:
    # the following line is no. 418
    from strop import maketrans, lowercase, uppercase, whitespace
    letters = lowercase + uppercase
except ImportError:
    pass					  # Use the original versions

AW: AW: AW: AW: [Jython-users] Import doesn't work (perfectly - but it does!)

[Joern E. <Joe...@mi...>]

Hi all.

Here are now the latest results from my try to import within a script. 
Likely this will be the last e-mil from me. At the moment I'm the 
doc-writer-man because my practical work (I'm a student) will be finished 
in two weeks, therefore I have to write one report for my employer as well 
as one for the Fachhochschule (It's comparable to a college).
Ok guys, here we go:

> On Wed, 25 Jul 2001, Joern Eckhoff wrote:
> > now my script looks like this:
> >
> > # ----------- begin ob script
> > import java
> > java.lang.System.getProperty("python.home")
> > java.lang.System.getProperty("python.path")
> >
> > import sys
> > sys.path.append("c:\\program files\\jython;c:\\program 
files\\jython\\lib")
>
> This append may be the culprit. Sorry if I've missed this in earlier
> mails, but for...
>
>     sys.path.append("c:\\;c:\\windows\\desktop")
>     import test  # a Jython script on my desktop
>
> The above does not work. sys.path is a list of individual directories,
> rather than system directory representations (e.g.
> ["\\path\\one", "\\path\\two"] instead of \\path\\one;\\path\\two).
> Instead, if I use:
>
>     sys.path.append("c:\\")
>     sys.path.append("c:\\windows\\desktop")
>     import test  # a Jython script on my desktop
>
> All is well.  So, give this a try:
>
>     sys.path.append("c:\\program files\\jython\\Lib") # only one dir
>     # or
>     sys.path.extend(
>         ("c:\\program files\\jython", "c:\\program files\\jython\\Lib")
>     )

I've changed this part of my script and now it looks like this:

import sys
sys.path.append("c:\\program files\\jython")
sys.path.append("c:\\program files\\jython\\lib")

> > print "python.home: ",java.lang.System.getProperty("python.home")
> > print "python.path: ",java.lang.System.getProperty("python.path")
> > print "sys.path: ",sys.path
> > print "sys.prefix: ",sys.prefix
> >
> > # Import support for strings
> > import string
> >
> > # Get the value of the scalar node
> > value = scriptinterface.getNodeValue(".1.3.6.1...")
> >
> > # Convert value to INT
> > valueAsInt=string.atoi(value)
> >
> > # Add 1 to value
> > valueAsInt=valueAsInt+1
> >
> > # Set a limit of 8 for value
> > if valueAsInt > 8:
> > 	valueAsInt=1
> >
> > # Convert valueAsInt back to string
> > value=str(valueAsInt)
> >
> > # Write back (increased) value to node
> > scriptinterface.updateValue(".1.3.6.1...",value,"CONST")
> > # ----------- end ob script

<snip>

> > - the
> > '.\\jars\\Lib' is the path leading to the jars containing all the
> > class-files of the AgentSimulator. The module 'string.py' actually is
> > present at 'c:\program files\jython\lib'. Doesn't it indicate the path 
to
> > the modules is missing? Does jython use sys.path as well as 
python.path?
>
> Properties, like python.path, python.home and etcettera, are all about
> initializing Jython. Java code takes steps to set Jython's system state
> before actually creating the interpreter instance, and these property
> values are what is used in these steps. The main step is
> PythonInterpreter.initialize(), but remember that this method should be
> called before instantiating an interpreter. After instantiation, Jython's
> sys module as the final word. python.path is added to the sys.path during
> initialization. Following that, what is in sys.path is the final word.

Ok, I see. Then it wouldn't wonder that the script now works. There's only 
one blemish left. When starting the script _the first time_ (i.e. when 
PythonInterpreter is initialized the first time after restart) it results 
in a NoSuchMethodError thrown by the module string.py in line 418. I've 
attached the log-file, the script and my version of string.py (please see 
attached file.zip) to let you have a look at it.

For me it looks like string.py couldn't find the module named strop.?. I've 
searched for it with mask *strop*.* at c:\ and all subfolders but the only 
file I've found was test_strop.py at c:\program files\Python\Lib\test. I 
guess everthing will be all right after adding strop.? to my installation.

<snip>

> Cheers,
> Robert

cu Joe

 

[Jython-users] ANN: Third alpha release of Jython-2.1

[<bc...@wo...>]

I am happy to announce the third alpha release of Jython 2.1.

Jython is a Java implementation of the Python programming
language.  It allows users to compile Python source code to
Java byte codes, and run the resulting bytecodes on any Java
Virtual Machine.  It is a very seamless and smooth
integration with Java:  from Python you have complete access
to all Java libraries, can build applets, can integrate with
Java beans, and can subclass Java classes in Python and vice
versa.  Like Python, and unlike Java, Jython can also be
used interactively:  just type some Jython code at the
prompt and see the results immediately.

A java installer is available for download at the Jython website:

    http://www.jython.org/

Installation on version 2.1a3 is similar to version 2.0. Further 
information and tips on installation is available at:

    http://www.jython.org/install.html

Jython 2.1 aims to be feature compatible with Python 2.1.1 and among
the new feature are:

   - A settable console encoding will allow windows users to enter
     national characters at the command prompt.
   - The names of zip- and jarfiles can be added to sys.path.

A complete list of changes and differences are available here:

  http://www.jython.org/NEWS.html

A list of fixed bugs can be found here:

  http://sourceforge.net/tracker/?group_id=12867&atid=112867

Change the Status input box to "Closed" and the Group input box to
"Fixed in 2.1a3" and press the "Browse" button.


Bugs can be reported to the bug manager on SourceForge:

  http://sourceforge.net/bugs/?group_id=12867

Cheers,
the jython-developers

Re: [Jython-users] Re: [Jython-dev] new, trouble w/ simple applet

[<bc...@wo...>]

[Mats]

> >>I am using Jython 2.1a1 and JDK (from Sun) 1.3.1
> >
> >... and I believe 1.3.1 is the real problem. Even if it isn't, I
> >strongly doubt you can make java1 applets with a java2 JVM. You will
> >need to get hold of and install a JDK1.1 and use that when running
> >jythonc.
>
>I'm wondering if there are any sensible solutions to this.
>Can the 1.1 JDK coexist with a 1.3?

It can. I have JDK1.1.7A, JDK1.2.1, JDK1.3, JDK1.4, IBMJava1.3 and
MS-SDK4.0 all installed in the same directory.

Some hints (for windows) off the top of my head include:

- I don't set PATH or CLASSPATH in the controlpanel. Instead I have some
small .bat scripts that let me choose java versions. 

- When installing a Java2 from javasoft, I *always* remove the java.exe 
file in the windows system directory (c:\WINNT\system32 IIRC).

>I had understood that the purpose of the "Java plugin" that
>now comes bundled with the 1.3.x distribution kit was for
>this reason: you can't count on the browser, but you can
>add a plugin to take care of it.  I haven't had any joy
>making that work, however.  Is there something special one
>can do - thus enabling a 1.3-built Applet to run? i've
>sometimes detected that the plugin is active, but I seem
>never to have gotten it to work for a Jython-built applet.

Sorry, I have no experience with the plugin. Anyone else? 

I think it is possible to make a sandboxed plugin applets, but not all
the infrastructure is in place for applets that want to move outside the
default security.

>I don't believe this compatibility headache is unique to
>Jython, but the situation's not going to get better:  Sun's
>started the end-of-life track on the 1.1 JDK (thus "continue
>to build with 1.1" is not going to remain a viable story).

When java1 applets are the goal, I doubt there is any alternatives. We
may be able toi improve the situation slightly, so that it isn't
necessary to have jython installed with the jdk1.1. But the jdk1.1 class
files (classes.zip) must still be available when building applets.

regards,
finn