jython-users — Discussion of and questions about using Jython

RE: [Jython-users] [ANN] JythonInterpreter 0.5 and PyUtils 0.1

[Carlos Q. <car...@rt...>]

>F5 - Import the current buffer into the interpreter (or reload)

>Some variables are always imported into the interpreter environment
such as buffer if you >execute in the interpreter

execfile(buffer.getPath())

the current buffer will be executed

>And Run buffer (with and without step debugging)

I haven't tried anything with debugging

>I'm thinking that the Jython Interpreter plug-in could add a context
menu selection to=20
>any edit buffer that has mode=3Dpython

>Will the interpreter get events when buffers are opened, closed and
mode changed?=20

I've been thinking about that possibility but since it can be done so
simply with a command line I haven't bothered. But if users want it ...
;-)
The nice think doing it in the menu is that you can associate a hotkey
to it

-

Thoughts?

Brad Clements,                bk...@mu...   (315)268-1000
http://www.murkworks.com                          (315)268-9812 Fax
netmeeting: ils://ils.murkworks.com               AOL-IM: BKClements


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Re: [Jython-users] [ANN] JythonInterpreter 0.5 and PyUtils 0.1

[Brad C. <bk...@mu...>]

On 20 Sep 2001 at 9:46, Carlos Quiroz wrote:

> Today was released the JythonInterpreter Plugin 0.5 for jEdit
> http://www.jedit.org, I whish jython developers can take a look since
> jEdit is an excellent editor and now it is jython enabled.
> 
> Aditionally there is a PyUtils plugin which contains a class browser for
> python, this plugin should include many more utilities in the near future
> and I invite everybody to contribute to it
> 

This is pretty slick. I'm working up a set of articles for Novell on how to use Jython to 
develop portal gadgets. I had planned on using PythonWin as the editor on Windows in 
screen shots.. But using Jedit with these plugins would actually be simpler for users.

However, I really miss two features from PythonWin.

F5 - Import the current buffer into the interpreter (or reload)
 
And Run buffer (with and without step debugging)

I'm not so concerned about debugging, but importing the current buffer into the current 
Jython  Interpreter would be very handy. 

How would I go about adding this functionality? I know nothing about jedit plug-ins.. 

I'm thinking that the Jython Interpreter plug-in could add a context menu selection to 
any edit buffer that has mode=python

Will the interpreter get events when buffers are opened, closed and mode changed? 

-

Thoughts?

Brad Clements,                bk...@mu...   (315)268-1000
http://www.murkworks.com                          (315)268-9812 Fax
netmeeting: ils://ils.murkworks.com               AOL-IM: BKClements

RE: [Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

Hi,

On Thu, 20 Sep 2001, Humbel Otmar wrote:

>
> This is just a guess (I'm not an expert). Maybe try, in test2.py:
> 	sys.add_package("com.ericsson.test1")
> 	from com.ericsson.test1 import test1
> instead of:
> 	sys.add_package("com.ericsson.test1")
> 	import com.ericsson.test1
>
> The first is my absolute favourite style of importing, and I almost ever
> am successful with it.


Yes, in general I also use this method. However, in this case it did
not have any effect on the problem.

test2.py:
---------
import sys
sys.add_package("com.ericsson.test1")
from com.ericsson.test1 import test1
test1.main([""])


Regards,
Kevin


_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

RE: [Jython-users] CLASSPATH problem

[Humbel O. <Otm...@bi...>]

[ Kevin McNamee ]

[snip]

> test2.py:
> ---------
> import sys
> sys.add_package("com.ericsson.test1")
> import com.ericsson.test1

> AttributeError: java package 'com.ericsson.test1' has no=20
> attribute 'test1'

> I wonder if calling the add_package procedure is simply allowing the
> import statement to succeed without providing any real connection to
> another jar file.  test1.jar might as well not exist.


This is just a guess (I'm not an expert). Maybe try, in test2.py:
	sys.add_package("com.ericsson.test1")
	from com.ericsson.test1 import test1
instead of:
	sys.add_package("com.ericsson.test1")
	import com.ericsson.test1

The first is my absolute favourite style of importing, and I almost ever
am successful with it.

Good luck !
Oti.

RE: [Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

On Thu, 20 Sep 2001, Humbel Otmar wrote:
> maybe this could be a typo. You had in test2.py:
> 	sys.add_package("com.ericcson.test1")

Doh! I am going blind with the permutations.
Now I get a _little_ further.


test1.py:
---------
class gofaster:
	def __init__(self):
		print "Zoom"
gofaster()


Compile:
--------
# jythonc -a -p com.ericsson.test1 -j test1.jar test1.py


test2.py:
---------
import sys
sys.add_package("com.ericsson.test1")
import com.ericsson.test1
print "dir(com.ericsson.test1):", dir(com.ericsson.test1)
com.ericsson.test1.test1.main([""])

Compile:
--------
# jythonc -a -p com.ericsson.test2 -j test2.jar test2.py

Test:
-----
# java -jar test2.jar
dir(com.ericsson.test1): ['__name__']
Java Traceback:

	at org.python.core.Py.AttributeError(Py.java:90)
	at org.python.core.PyObject.__getattr__(PyObject.java:672)
	at com.ericsson.test2.test2$_PyInner.main$1(test2.java:47)
	at com.ericsson.test2.test2$_PyInner.call_function(test2.java:34)
	at org.python.core.PyTableCode.call(PyTableCode.java:155)
	at org.python.core.imp.createFromCode(imp.java:157)
	at org.python.core.Py.runMain(Py.java:798)
	at com.ericsson.test2.test2.main(test2.java:61)
Traceback (innermost last):
  File "/home/qkename/jwork/extdirstest/test2.py", line 0, in main
AttributeError: java package 'com.ericsson.test1' has no attribute 'test1'


Result:
-------
I have stopped adding the Class-Path field to the manifest, since Samuel
said that it ignores this and I can confirm it is so.

I wonder if calling the add_package procedure is simply allowing the
import statement to succeed without providing any real connection to
another jar file.  test1.jar might as well not exist.


Relentlessly,
Kevin

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

RE: [Jython-users] CLASSPATH problem

[Humbel O. <Otm...@bi...>]

Hello Kevin,


maybe this could be a typo. You had in test2.py:
	sys.add_package("com.ericcson.test1")

instead of IMHO:
	sys.add_package("com.ericsson.test1")

if I look at the import=20
	from com.ericsson.test1 import test1


greetings
Oti.


[ Kevin McNamee ]

> test2.py:
> ---------
> import sys
> sys.add_package("com.ericcson.test1")
> from com.ericsson.test1 import test1
>=20
[snip]
> ImportError: No module named ericsson

Re: [Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

Hi,

thanks for the input. However, ...

test1.py:
---------
class gofaster:
	def __init__(self):
		print "Zoom"
gofaster()


Compile:
--------
# jythonc -a -p com.ericsson.test1 -j test1.jar test1.py

Test:
-----
# java -cp test1.jar com.ericsson.test1.test1
Zoom



test2.py:
---------
import sys
sys.add_package("com.ericcson.test1")
from com.ericsson.test1 import test1

Compile:
--------
# jythonc -a -p com.ericsson.test2 -j test2.jar test2.py


MyManifest.txt:
--------------
Class-Path: test1.jar


Update Jar file:
----------------
# jar -umf MyManifest test2.jar


Test:
-----
# java -jar test2.jar
Java Traceback:

	at org.python.core.Py.ImportError(Py.java:180)
	at org.python.core.imp.dottedFind(imp.java:414)
	at org.python.core.imp.importName(imp.java:436)
	at org.python.core.imp.importName(imp.java:509)
	at org.python.core.ImportFunction.load(__builtin__.java:967)
	at org.python.core.ImportFunction.__call__(__builtin__.java:961)
	at org.python.core.PyObject.__call__(PyObject.java:250)
	at org.python.core.__builtin__.__import__(__builtin__.java:921)
	at org.python.core.imp.importOne(imp.java:518)
	at com.ericsson.test1.test1$_PyInner.main$1(test1.java:36)
	at com.ericsson.test1.test1$_PyInner.call_function(test1.java:28)
	at org.python.core.PyTableCode.call(PyTableCode.java:155)
	at org.python.core.imp.createFromCode(imp.java:157)
	at org.python.core.Py.runMain(Py.java:798)
	at com.ericsson.test1.test1.main(test1.java:54)
Traceback (innermost last):
  File "/home/qkename/jwork/extdirstest/test2.py", line 0, in main
ImportError: No module named ericsson


Result:
-------
The sys.add_package() workaround doesn't work. I wonder how this should
work since if as you say, Jython doesn't read the Class-Path field, then
it won't be able to find the jar file in the first place.

As for the patch. How should this be applied? I did not see any
instructions on the webpage about how to do this.
Does the workaround above have to be used together with the patch?


Much appreciated,
Kevin



> Hi
>
> [kevin.mcnamee]
> > test2.py:
> > ---------
> > from com.ericsson.test1 import *
> > test1.main([""])      #              <--- C style???
>
> test1 has no main function defined, OTOH
> the top level statements of a module are executed on importing
> so no need for that.
>
> from.com.ericsson.test1 import *
>
> import * from a java package should not be used in production code,
> in particular its support through jythonc is quite fragile,
> and does not work with the 1st workaround proposed in the previous
> message , I don't rembember for the patch ...
>
> so a possible test2 is:
>
> import sys
> sys.add_package("com.ericcson.test1")
> from com.ericsson.test1 import test1
> # ^ executes the top-level stmts in test1.py
>
> regards.
>
>
>
>
>

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

[Jython-users] [ANN] JythonInterpreter 0.5 and PyUtils 0.1

[Carlos Q. <car...@rt...>]

Today was released the JythonInterpreter Plugin 0.5 for jEdit
http://www.jedit.org, I whish jython developers can take a look since
jEdit is an excellent editor and now it is jython enabled.

Aditionally there is a PyUtils plugin which contains a class browser for
python, this plugin should include many more utilities in the near
future and I invite everybody to contribute to it

Re: [Jython-users] CLASSPATH problem

[Samuele P. <pe...@in...>]

Hi

[kevin.mcnamee]
> test2.py:
> ---------
> from com.ericsson.test1 import *
> test1.main([""])      #              <--- C style???

test1 has no main function defined, OTOH
the top level statements of a module are executed on importing
so no need for that.

from.com.ericsson.test1 import *

import * from a java package should not be used in production code,
in particular its support through jythonc is quite fragile,
and does not work with the 1st workaround proposed in the previous
message , I don't rembember for the patch ...

so a possible test2 is:

import sys
sys.add_package("com.ericcson.test1")
from com.ericsson.test1 import test1  
# ^ executes the top-level stmts in test1.py

regards.

[Jython-users] Re: inconsistant arg expectations in jython

[Samuele P. <pe...@in...>]

Hi.

Mark Robinson wrote [on comp.lang.python]:

> I hope it isn't considered inappropriate to post jython questions here!

No, but if you're question is jython related (e.g. related to java
integration)
and not a python general question,
you are better served by jyt...@li...

>
> I am running jython 2.1a1 on winNT4 and getting a very unusual error. In
> responce to a getFocus event I attempt to determine  which object
> obtained the focus (in this case a JTextField object) as follows:
>
> e.getComponent().getClass().getName()
>
> At run time I am getting a TypeError exception saying that getName()
> expects 1 arg and is receiving 0. From the Java documentation it would
> seem that getName() doesn't ever take an argument.
> Can anyone tell me if this is implemented differently in jython or if I
> am just making a daft mistake, or where I might be able to find out what
> argument it is expecting (my searching has been fruitless).
>

That's tricky. Let's see

>>> from java.io import File
>>> from java.lang import Object
>>> Object.getName()
'java.lang.Object'
>>> File.getName()
Traceback (innermost last):
  File "<console>", line 1, in ?
TypeError: getName(): expected 1 args; got 0
>>> # ???

That's the very same problem. Why does this happen?
The contents of File.__dict__ masks the contents
File.__class__ .__dict__ , File.__class__ is java.lang.Class
but File has a getName method too, so File.getName
give you an unbound version of that method, that expects
a File argument  (the this/self argument):

>>> f=File('/usr')
>>> File.getName(f)
'usr'

In general when you want to call a method of java.lang.Class
on a Class instance and avoid this kind of clash, you should
use the unbound version:

>>> from java.lang import Class
>>> Class.getName(File)
'java.io.File'

Or using the pythonic classes protocol,
which has an equivalent support at least
for getName:

>>> File.__name__
'java.io.File'

You encounter the problem because java.awt.Component
has a getName method.

regards, Samuele Pedroni.

Re: [Jython-users] CLASSPATH problem

[Samuele P. <pe...@in...>]

Now, the sad part  about jython; jython ignores
the Class-Path in the manifest.

You can either use:
import sys
sys.add_package("your.java.package")

or try out the experimental patch at:

http://sourceforge.net/tracker/index.php?func=detail&aid=454329&group_id=12867&
atid=312867

in order to index your jars.
For reference see the thread

http://aspn.activestate.com/ASPN/Mail/Message/Jython-dev/754080

and

http://aspn.activestate.com/ASPN/Mail/Message/Jython-dev/754170

Please, ignore the part about RunJar, it will not be supported in that form.

regards.

Re: [Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

Hi again,

I have tried for several hours now to use the extension dirs, but they
don't seem to work. A small example where test2.jar tries to import a
test1.jar class:

test1.py:
---------
class gofaster():
	def __init__(self):
		print "Zoom"
faster()


Compile:
--------
# jythonc -a -p com.ericsson.test1 -j test1.jar test1.py

Test:
-----
# java -cp test1.jar com.ericsson.test1.test1
Zoom



test2.py:
---------
from com.ericsson.test1 import *
test1.main([""])      #              <--- C style???


Compile:
--------
# jythonc -a -p com.ericsson.test2 -j test2.jar test2.py


MyManifest.txt:
--------------
Class-Path: test1.jar


Update Jar file:
----------------
# jar -umf MyManifest test2.jar


Test:
-----
# java -jar test2.jar
Java Traceback:

	at org.python.core.Py.ImportError(Py.java:180)
	at org.python.core.imp.dottedFind(imp.java:414)
	at org.python.core.imp.importName(imp.java:436)
	at org.python.core.imp.importName(imp.java:509)
	at org.python.core.ImportFunction.load(__builtin__.java:967)
	at org.python.core.ImportFunction.__call__(__builtin__.java:961)
	at org.python.core.PyObject.__call__(PyObject.java:250)
	at org.python.core.__builtin__.__import__(__builtin__.java:921)
	at org.python.core.imp.importOne(imp.java:518)
	at com.ericsson.test1.test1$_PyInner.main$1(test1.java:36)
	at com.ericsson.test1.test1$_PyInner.call_function(test1.java:28)
	at org.python.core.PyTableCode.call(PyTableCode.java:155)
	at org.python.core.imp.createFromCode(imp.java:157)
	at org.python.core.Py.runMain(Py.java:798)
	at com.ericsson.test1.test1.main(test1.java:51)
Traceback (innermost last):
  File "/home/qkename/jwork/extdirstest/test1.py", line 0, in main
ImportError: No module named ericsson


Environment:
------------
Everything is done in one directory.
CLASSPATH is not set to anything.
Using Jython 2.0 on java1.3.1 (JIT: null).


Much appreciated,
Kevin.



On Tue, 18 Sep 2001, Samuele Pedroni wrote:

>
> >
> > > That's a java problem/design decision.
> > >
> > > Java -jar ignores the classpath and limits loading
> > > to the jar and the extension dirs.
> > >
> > > http://java.sun.com/j2se/1.3/docs/tooldocs/linux/java.html#options
> >
> > This webpage confirms that I can use '-cp' to set the classpath when
> > running my app.
> You have missed the point. It is not a matter of what the page says
> about -cp but what it says about -jar: (from the vary seem page)
>
>
> -jar
> Execute a program encapsulated in a JAR file. The first argument is the name of a JAR file
> instead of a startup class name. In order for this option to work, the manifest of the JAR file
> must contain a line of the form Main-Class: classname. Here, classname identifies the class
> having the public static void main(String[] args) method that serves as your application's
> starting point. See the Jar tool reference page and the Jar trail of the Java Tutorial for
> information about working with Jar files and Jar-file manifests.
>
> When you use this option, the JAR file is the source of all user classes, and other user class
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> path settings are ignored.
> ^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Now you can reread my previous message.
>
> >
> > This feels like something silly I've missed. Until now I have been trying
> > to avoid having to learn about the Java environment, but there seems to be
> > no helping it.
> >
> Avoiding to learn about the Java env and using jython is a bad
> idea...
>
> regards, Samuele Pedroni.
>

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

Re: [Jython-users] Junit , Java3D and Jython

[Ype K. <yk...@xs...>]

Dave,

>Dear All,
>just rejoined the jython/python community after a long break.
>I am a bout to embark on a project that requires unit testing and Java3D.
>Jython seems to be the obvious choice. To get me back in the swing of things
>does anyone have some simple demos of calling JUnit from Jython ?
>Ditto Java3D ? I have searched the archives but came up a blank, perhaps
>I am not searching the correct place ?
>	David

You might want to try PyUnit instead of JUnit, it works fine from Jython.
http://pyunit.sourceforge.net
It is based on the same design, demo's are included.
My guess is that it will be in the next release of jython.

As for Java3D: I have never used it...

Have fun,
Ype

Re: [Jython-users] CLASSPATH problem

[Samuele P. <pe...@in...>]

> 
> > That's a java problem/design decision.
> >
> > Java -jar ignores the classpath and limits loading
> > to the jar and the extension dirs.
> >
> > http://java.sun.com/j2se/1.3/docs/tooldocs/linux/java.html#options
> 
> This webpage confirms that I can use '-cp' to set the classpath when
> running my app.
You have missed the point. It is not a matter of what the page says
about -cp but what it says about -jar: (from the vary seem page)


-jar 
Execute a program encapsulated in a JAR file. The first argument is the name of a JAR file 
instead of a startup class name. In order for this option to work, the manifest of the JAR file 
must contain a line of the form Main-Class: classname. Here, classname identifies the class 
having the public static void main(String[] args) method that serves as your application's 
starting point. See the Jar tool reference page and the Jar trail of the Java Tutorial for 
information about working with Jar files and Jar-file manifests. 

When you use this option, the JAR file is the source of all user classes, and other user class 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
path settings are ignored. 
^^^^^^^^^^^^^^^^^^^^^^^^^

Now you can reread my previous message.

> 
> This feels like something silly I've missed. Until now I have been trying
> to avoid having to learn about the Java environment, but there seems to be
> no helping it.
> 
Avoiding to learn about the Java env and using jython is a bad
idea...

regards, Samuele Pedroni.

Re: [Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

Hi,

> That's a java problem/design decision.
>
> Java -jar ignores the classpath and limits loading
> to the jar and the extension dirs.
>
> http://java.sun.com/j2se/1.3/docs/tooldocs/linux/java.html#options

This webpage confirms that I can use '-cp' to set the classpath when
running my app.

# java -cp /opt/ericsson/nms_cif_pas/lib/nms_cif_pas.jar -jar myapp.jar

But this doesn't work. Should I be setting the classpath compiler option
in my .jython file also?

This feels like something silly I've missed. Until now I have been trying
to avoid having to learn about the Java environment, but there seems to be
no helping it.

Regards,
Kevin.

>
> On the other hand you can use as a surrugate
> the Class-Path attribute in the manifest file:
>
> http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html#Main Attributes
>
> regards, Samuele Pedroni.
>
> > From: Kevin McNamee <kev...@er...>
> > X-X-Sender: <qk...@lm...>
> > To: Jyt...@li...
> > MIME-version: 1.0
> > Subject: [Jython-users] CLASSPATH problem
> > X-BeenThere: jyt...@li...
> > X-Mailman-Version: 2.0.5
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> > List-Post: <mailto:jyt...@li...>
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> > X-Original-Date: Tue, 18 Sep 2001 11:30:37 +0200 (MEST)
> > Date: Tue, 18 Sep 2001 11:30:37 +0200 (MEST)
> > X-Keywords:
> >
> > Hi,
> >
> > probably not a novel question, but how do I get my compiled script to look
> > in CLASSPATH.
> >
> > I do the following:
> >
> > # jythonc -a -j gui.jar Gui.py
> >
> > Then I try
> >
> > # setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
> > # java -jar gui.jar
> >
> > or
> >
> > # java -cp /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar -jar gui.jar
> >
> > but neither work.
> > It works fine when I use the interpreter:
> >
> > # setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
> > # jython Gui.py
> >
> > What I am doing wrong?
> >
> >
> > Any help appreciated,
> > Kevin
> >
> > _________________________________________________
> > Name/Title : Kevin McNamee, Software Consultant
> > Phone      : +46 13 32 1165
> >
> >
> > _______________________________________________
> > Jython-users mailing list
> > Jyt...@li...
> > https://lists.sourceforge.net/lists/listinfo/jython-users
>

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

Re: [Jython-users] CLASSPATH problem

[Samuele P. <pe...@in...>]

Hi.

That's a java problem/design decision. 

Java -jar ignores the classpath and limits loading
to the jar and the extension dirs.

http://java.sun.com/j2se/1.3/docs/tooldocs/linux/java.html#options

On the other hand you can use as a surrugate
the Class-Path attribute in the manifest file:

http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html#Main Attributes

regards, Samuele Pedroni.

> From: Kevin McNamee <kev...@er...>
> X-X-Sender: <qk...@lm...>
> To: Jyt...@li...
> MIME-version: 1.0
> Subject: [Jython-users] CLASSPATH problem
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> X-Original-Date: Tue, 18 Sep 2001 11:30:37 +0200 (MEST)
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> 
> Hi,
> 
> probably not a novel question, but how do I get my compiled script to look
> in CLASSPATH.
> 
> I do the following:
> 
> # jythonc -a -j gui.jar Gui.py
> 
> Then I try
> 
> # setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
> # java -jar gui.jar
> 
> or
> 
> # java -cp /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar -jar gui.jar
> 
> but neither work.
> It works fine when I use the interpreter:
> 
> # setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
> # jython Gui.py
> 
> What I am doing wrong?
> 
> 
> Any help appreciated,
> Kevin
> 
> _________________________________________________
> Name/Title : Kevin McNamee, Software Consultant
> Phone      : +46 13 32 1165
> 
> 
> _______________________________________________
> Jython-users mailing list
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RE: [Jython-users] import from jar--clarification

[Samuele P. <pe...@in...>]

[Phil Surette]
> <AntonioSaid>
> One question to those of you who know the source. In what class does the
> bulk of the loading take place? I want to be able to load both *.class files
> and *py files and I don't think it should be too bad of a change.
> </AntonioSaid>
> 
> I believe I answered this directly in my first reply to your question. Apply
> this patch:
The patch does not load .class files.

> 
> org/jython/core/imp.java in jython-2.1a3:
> imp.java
> 498a499,502
> >         //if it's not a builtin or in the python path, try the classpath
> >         ret = loadFromClassLoader(name, imp.class.getClassLoader());
> >         if (ret != null) return ret;
> >
This patch has been posted on jython-dev, nobody for the moment could
comment and dedicate time on this

regards, Samuele Pedroni

PS: be patient ;)

RE: [Jython-users] import from jar--clarification

[Phil S. <psu...@es...>]

<AntonioSaid>
One question to those of you who know the source. In what class does the
bulk of the loading take place? I want to be able to load both *.class files
and *py files and I don't think it should be too bad of a change.
</AntonioSaid>

I believe I answered this directly in my first reply to your question. Apply
this patch:

org/jython/core/imp.java in jython-2.1a3:
imp.java
498a499,502
>         //if it's not a builtin or in the python path, try the classpath
>         ret = loadFromClassLoader(name, imp.class.getClassLoader());
>         if (ret != null) return ret;
>

Note that I don't know the source code, just poked around for a couple of
hours and this seems to work. 

[Jython-users] sys-package-mgr

[Kevin M. <kev...@er...>]

Hi,

nothing serious but..

My home directory is mounted on two machines. The same Jython is installed
on both of them. When I alternate between telnet sessions, jython always
starts with

*sys-package-mgr*: processing modified jar,
'/opt/python/jpython/jython.jar'

The jar files have the same size, checksum and location. Why is jython so
paranoid?


Regards,
Kevin

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

[Jython-users] CLASSPATH problem

[Kevin M. <kev...@er...>]

Hi,

probably not a novel question, but how do I get my compiled script to look
in CLASSPATH.

I do the following:

# jythonc -a -j gui.jar Gui.py

Then I try

# setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
# java -jar gui.jar

or

# java -cp /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar -jar gui.jar

but neither work.
It works fine when I use the interpreter:

# setenv CLASSPATH /opt/ericsson/nms_cif_ist/lib/nms_cif_ist.jar
# jython Gui.py

What I am doing wrong?


Any help appreciated,
Kevin

_________________________________________________
Name/Title : Kevin McNamee, Software Consultant
Phone      : +46 13 32 1165

[Jython-users] Junit , Java3D and Jython

[Dave D. <d.j...@hu...>]

Dear All,
just rejoined the jython/python community after a long break.
I am a bout to embark on a project that requires unit testing and Java3D.
Jython seems to be the obvious choice. To get me back in the swing of things 
does anyone have some simple demos of calling JUnit from Jython ?
Ditto Java3D ? I have searched the archives but came up a blank, perhaps
I am not searching the correct place ?
	David

________________________________________________________________________________

  	         ********************************************************
                 *     David Dench                          		*
                 *     School of Computing & Mathematics    		*
                 *     The University of Huddersfield       		*
                 *     Tel:  01484  472083	     			*
                 *     email: d.j...@hu...   	 		*
    		 *     web:   http://scom.hud.ac.uk/staff/scomdjd	*
                 ********************************************************
________________________________________________________________________________

Re: [Jython-users] import from jar--clarification

[dman <ds...@ri...>]

On Sun, Sep 16, 2001 at 10:40:10PM -0400, Antonio Rodriguez wrote:
| Let me clarify:
| 
| Im not asking how to put classes in the classpath. I'm asking how to
| put all of the standard python library (the .py modules like re.py
| and httplib.py) that compile to *$py.class into a jar in such a way
| that when a PythonInterpreter runs over the line: import re, it can
| import the python library from a jar.

Oh, now I see.

You can use jythonc to compile a python program and all its
dependencies into a single jar file (which is suitable for
distribution as a java applet).  Note, however, that the result from
jythonc isn't .py files in a jar file but rather .class files in a jar
file.

HTH,
-D

Re: [Jython-users] Simple java class import

[Samuele P. <pe...@in...>]

[Humbel Otmar]
> 
> Please let me try to describe the problem we have with our jar file.
> First at all, I think it is not a Jython issue. If
> java.util.Locale.getAvailableLocales() is called with this jar file in
> the classpath, we get:
> 'file IO Exception:java.util.zip.ZipException: invalid EXT
> descriptor signature'
>
[snip] 
> 
> I tend to blame PKZIP for that (but its only a guess), because if we do
Thanks for the report.
No, the real problem is that sun didn't get the zip specification right
or there are two "interpeprations" of it and took care of just one.
To be honest the java.util.zip classes are a bit fragile, and with
java 1.1 also have many bugs. But I don't think we will
write our own versions ;(

The moral: better use sun jar tool to create a jar to be used
with java and jython.

I don't remember the details but e.g. zipfile.py also seems
to produce on some cases zips that java does not like.

regards.

Re: [Jython-users] import from jar--clarification

[Samuele P. <pe...@in...>]

Hi.

> Thanks to all who answered my original question. I wanted to put a caveat in
the archive for future reference.
>
> This scheme works well but appears a bit finicky. Namely, if you pre-compile
the standard python library into .class files (to save time later), they will
not load from a jar.
Do you mean *$py.class files produced by the interp? you should be able to put
them inside
the jar and that should work, otherwise is a bug :)
If you mean precompiled by jythonc ... that's another thing.

> One question to those of you who know the source. In what class does the bulk
of the loading take place? I want to be able to load both *.class files and *py
files and I don't think it should be too bad of a change.
>
See above. In any case importing is implemented in org.python.core.imp and the
various *PackageManager
classes ...

regards, Samuele Pedroni.

RE: [Jython-users] import from jar--clarification

[Antonio R. <An...@ho...>]

Thanks to all who answered my original question. I wanted to put a caveat in the archive for future reference.

This scheme works well but appears a bit finicky. Namely, if you pre-compile the standard python library into .class files (to save time later), they will not load from a jar. Also, the jar should have the structure Lib/***.py as opposed to just **.py at the top level or it won't work.


One question to those of you who know the source. In what class does the bulk of the loading take place? I want to be able to load both *.class files and *py files and I don't think it should be too bad of a change.

Does anyone have a reason as to why this would be a _bad_ idea. I figure it can only make things faster...

Antonio

-|Phil Surette <psu...@es...> wrote on Mon Sep 17 09:46:35 EDT 2001: 

Great tip Carlos!

So, if you change to your jython home directory and create a lib.jar like
this:
>jar -cvf lib.jar Lib
Then you can invoke jython like this:
>java -cp jython.jar -Dpython.path=lib.jar!Lib org.python.util.jython
and all your imports will work...

To verify that the .py files are really coming from lib.jar and not from
the $JYTHON_HOME/Lib directory, you might want to rename the Lib directory
temporarily. Jython seems to be able to search for the Lib directory
based on the location of jython.jar, though how it does this I do
not know.

-----Original Message-----
From: Carlos Quiroz [mailto:car...@we...]
Sent: Monday, September 17, 2001 3:55 AM
To: jyt...@li...
Subject: Re: [Jython-users] import from jar--clarification


On Monday 17 September 2001 05:40, Antonio Rodriguez wrote:
To do this you can bundle your py file into a subdir for the module, let say

subdir util and filt util1, then it will be in the jar util.jar. You can add

the jar to the sys.path by doing

import sys
sys.path.append("/path/to/jar/util.jar!util");

after this is possible to do

from util import util1

You can also do this in java via

PySystemState sys = Py.getSystemState();
sys.path.append(new PyString("/path/to/jar/util.jar!util"));

Notice that this works only in jython 2.1a3

Therefore you can bundle all standard libraries in a lib.jar and do

sys.path.append("/path/to/jar/lib.jar!Lib")

Regards

> Let me clarify:
>
> Im not asking how to put classes in the classpath. I'm asking how to put
> all of the standard python library (the .py modules like re.py and
> httplib.py) that compile to *$py.class into a jar in such a way that when
a
> PythonInterpreter runs over the line: import re, it can import the python
> library from a jar.
>
>
> Thanks.
>
>
> -|dman <ds...@ri...> wrote on Sun Sep 16 20:56:03 EDT 2001:
>
> On Sun, Sep 16, 2001 at 05:11:10PM -0400, Antonio Rodriguez wrote:
> | How do I put a jar in the path of a PythonInterpreter object?
>
> $ java -help
> Usage: java [-options] class [args...]
>            (to execute a class)
>    or  java -jar [-options] jarfile [args...]
>            (to execute a jar file)
>
> where options include:
>     -client       to select the "client" VM
>     -server       to select the "server" VM
>     -classic      to select the "classic" VM
>                   If present, the option to select the VM must be first.
>                   The default VM is -client.
>
>     -cp -classpath <directories and zip/jar files separated by :>
>                   set search path for application classes and resources
>     -D<name>=<value>
>                   set a system property
>     -verbose[:class|gc|jni]
>                   enable verbose output
>     -version      print product version and exit
>     -showversion  print product version and continue
>     -? -help      print this help message
>     -X            print help on non-standard options
>
> $
>
>
> The use -classpath option to the JVM you run jython with.
>
> HTH,
> -D
>
>
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