jython-users — Discussion of and questions about using Jython

Re: [Zope] Re: [Jython-users] Jython and Zope

[Chris W. <ch...@ni...>]

Terry Hancock wrote:
> 
> Nicolas Bill Russell wrote:
> > I just want to know if Jython is supported by Zope? I'm new to Python
> > so go easy on me. :)
> 
> As far as I know (and I've been looking -- still am),
> there's no direct support for Jython in Zope. However,
> Jython is strictly a *client-side* technology and
> Zope is strictly *server-side* -- so in principle, there
> isn't much overlap.  

Urm, I think you may be misunderstanding Jython. Jython is an implementation of
the Python language in Java rather than C, as used by normal python.

So, as such, Jython is only as client-side as python is. 

However, you can't run Zope on Jython because Zope requires several C-Extensions
to Python which wouldn't work under Jython.

cheers,

Chris

Re: [Jython-users] How to use PyChecker with Jython

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

From: Ype Kingma <yk...@xs...>
> Alexander,
>
> >Hi,
> >
> >Is it possible to use PyChecker from Jython? If it can't check Java classes,
how can I make PyChecker ignore Java packages? I'have played around some with
the blacklist PyChecker option but I'm still getting import errors and
PyChecker doesn't check my python code. Even if I wrap all Java class access
into another python module, PyChecker still complains that it can't find the
indirectly imported Java packages and quits without checking anything.
> >
> >Any help would be very much appreciated.
>
> PyChecker does most of it's work by checking the python byte codes generated
by
> the CPython compiler.

sadly true.

> Jython compiles to java byte codes and these cannot be checked by
> PyChecker used from jython.
>

> Your best bet is to use PyChecker from CPython and have it analyze
> your Jython modules. This means that PyChecker will fail to load
> java byte code modules, but at least your python code should be checked.
>
> I don't know how PyChecker deals with modules it can't find.
>

AFAIK the first thing it does with
an analyzed module is trying to plainly import it,
if the module references something that cannot be
imported, PyChecker dies.

I care about these issues with PyChecker, and I have ideas
and plans to make it work with Jython. Clearly
a different approach by PyChecker would make
everybody's life easier, OTOH with open source
projects everybody has legitimately his own agenda.

So what I'm planning are huge hacks and nobody
should hold his breath <wink>.

regards, Samuele Pedroni.

Re: [Jython-users] How to use PyChecker with Jython

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

Alexander,

>Hi,
>
>Is it possible to use PyChecker from Jython? If it can't check Java classes, how can I make PyChecker ignore Java packages? I'have played around some with the blacklist PyChecker option but I'm still getting import errors and PyChecker doesn't check my python code. Even if I wrap all Java class access into another python module, PyChecker still complains that it can't find the indirectly imported Java packages and quits without checking anything.
>
>Any help would be very much appreciated.

PyChecker does most of it's work by checking the python byte codes generated by
the CPython compiler.
Jython compiles to java byte codes and these cannot be checked by
PyChecker used from jython.

Your best bet is to use PyChecker from CPython and have it analyze
your Jython modules. This means that PyChecker will fail to load
java byte code modules, but at least your python code should be checked.

I don't know how PyChecker deals with modules it can't find.

Good luck,
Ype

-- 

Re: [Jython-users] Jython and Zope

[Terry H. <ha...@an...>]

Nicolas Bill Russell wrote:
> I just want to know if Jython is supported by Zope? I'm new to Python
> so go easy on me. :)

As far as I know (and I've been looking -- still am),
there's no direct support for Jython in Zope. However,
Jython is strictly a *client-side* technology and
Zope is strictly *server-side* -- so in principle, there
isn't much overlap.  You could use DTML Methods/
Documents and File objects to hold the Jython code and
the interpreter.

What would be kind of cool, though, is a Zope product to
encapsulate a Jython applet as a Zope object. I think
it ought to:

1) Provide a syntax-sensitive editing interface (can
   we just use the one currently provided for Python
   scripts?  I'm not sure if the syntax is similar
   enough.  I mean -- is the syntax checker aware of
   standard modules (which may differ) or just legal
   Python syntax (which should be the same)?

   Actually, it occurs to me that this may not really
   be a "syntax checker" -- is it actually just importing
   the module and reporting the traceback from that? In
   which case, this is really the same as #3 below.

2) Automatically provide the wrapper code to deliver
   the Jython interpreter applet and generate the
   correct <applet> tags, etc.  This would be akin
   to what Zope does for images.

3) It might be good to actually pre-compile into
   a .jar file (or whatever is appropriate -- I'm a
   Java/Jython newbie, so go easy on _me_ too ;) ), on
   the server. Probably one should do this whenever
   the program is edited on the server, and report
   errors/traceback from the program.  This probably
   has to be done from an unrestricted Python module
   (which may in turn call other programs on the
   server, such as jythonc), so that means putting
   it in as an External method, or (better) including
   it in a Zope Product.

   With Jython, there's an obvious cache-optimization
   problem -- you want to make sure you only download
   the core/interpreter part once, and the applets
   separately.  You also want to avoid triggering
   various security problems with client-side code,
   which seem to happen when you evaluate/execute
   strings inside of Python.  This probably ought to
   be done on the server if it can't be avoided (?).

It seems to me that there's enough repetitive work
here to justify making a special product to simplify
it.  If you had this, I think you could just edit
a Jython client-side method in Zope, save it (which
would compile and store on the server), and then
embed it into a DTML document, using
<dtml-var myJythonObject>.

I was thinking of waiting until the O'Reilly book
on Jython comes out (I'm not experienced at Java,
so I don't think the other book is going to help
me so much), and then having a go at writing such
a product myself, since I want to do a fairly
large amount of Jython stuff with Zope. My attraction
to this is the beauty of having both server and
client programmed in the same programming language
(Python),  instead of having to learn and interface
between two different ones. This would also reduce
the burden of deciding where to draw the line between
server- and client-side components, since they would
then be relatively easy to port back and forth.

So ... Has anyone already done this (and I'm just not
so good at finding it), or is anyone interested in
collaborating / discussing this with me?

Cheers,
Terry

-- 
------------------------------------------------------
Terry Hancock
ha...@an...       
Anansi Spaceworks                 
http://www.anansispaceworks.com 
P.O. Box 60583                     
Pasadena, CA 91116-6583
------------------------------------------------------

Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

[Dinu G. <gh...@da...>]

Finn Bock <bc...@wo...>:

> As Samuele has explained, we can't do a chdir in 100% java and we will
> *never* include JNI code with the jython distribution.

Thanks for the clarification! I got the same explanation from Samuele 
over private email. Thanks, Samuele!

> But we could (as we already do for the readline module) include support
> code that require the presence of a JNI module to work. So if anybody
> needed chdir() or chmod() or the full stat() values badly enough, she
> could create a copy of the javaos.py module that used one of the JNI
> module (there are several such candidates). 
> 
> We could then add a mechanisme to jython (in the registry) that allowed
> users to choose either the existing 100% pure java version of "os" or
> one the JNI alternatives.
>
> The fact that I haven't maintained jnios for quite a while should be a
> good indication that I don't need chdir() myself.

I'll check soon if I really need chdir or if I can replace it 
somehow... In fact, what I'm trying to do is port the ReportLab
toolkit to Jython, and chdir is what seems to prevent the test
suite (and some tools and demos) from working.

So, my frustration is maybe more with Java than with Jython and
surely I should have better investigated the issues instead of 
showing my Java ignorance. Sorry for that!

What I'd suggest is some sort of collection of "porting stories"
(Python to Jython) and/or issues to expect when doing this kind
of thing. I'm not sure the FAQ is the best place for that, but
maybe I'm wrong. OTOH, maybe it is too much to ask from Python
programmers to code in a Jython-friendly way? Well, at least it
would be helpful to know where to expect potential pitfalls.
What do people think?

The good news is that many parts of ReportLab seem to be working
ok, especially the vector graphics stuff (after fixing the list
builtin function)! 

Regards,

Dinu

Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

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

[Dinu Gherman]

>Hi, 
>
>I'm just starting to use Jython on OS X and run into several
>problems, obne of them being this:
>
>[localhost:~] dinu% jython
>Jython 2.1 on java1.3.1 (JIT: null)
>Type "copyright", "credits" or "license" for more information.
>>>> import os
>>>> os.chdir('..')
>Traceback (innermost last):
>  File "<console>", line 1, in ?
>  File "/Applications/Additions/Jython-2.1/Lib/javaos.py", line 56, in chdir
>OSError: [Errno 0] chdir not supported in Java: ..
>>>> 
>
>Any ideas? 

As Samuele has explained, we can't do a chdir in 100% java and we will
*never* include JNI code with the jython distribution.

But we could (as we already do for the readline module) include support
code that require the presence of a JNI module to work. So if anybody
needed chdir() or chmod() or the full stat() values badly enough, she
could create a copy of the javaos.py module that used one of the JNI
module (there are several such candidates). 

We could then add a mechanisme to jython (in the registry) that allowed
users to choose either the existing 100% pure java version of "os" or
one the JNI alternatives.

The fact that I haven't maintained jnios for quite a while should be a
good indication that I don't need chdir() myself.

regards,
finn

[Jython-users] Jython and Zope

[<mag...@ya...>]

Greetings!

I just want to know if Jython is supported by Zope? I'm new to Python so go easy on me. :) 

Is there any other way to use Python to access serialized Java objects? 

Thanks!

Regards,

Bill Russell Gagalac-Nicolas



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Re: [Jython-users] using jython inside java

[Oti <oh...@ya...>]

--- ni...@bi... wrote:
> Hi, I want to use jython to make some calculations in my java program
> and return a result to my jython program. I am creating an instance
> of jython interpreter in my java program and calling the
> interpreter's exec method. It do some computatios and create a set of
> objects. I have to use this set of objects in my java program. I mean
> jython interpreter MUST return a set to my java program. However, the
> exec method returns void value. How can I use jython in my java
> program so that I can use the values that were calculated in jython
> directly in my java code ? Thx, a lot.

If you use the eval() method of the interpreter, you get the result
back as a PyObject. You can then turn this into a Java Object using the
static method Py.tojava(), or the __tojava__() method on PyObject
itself.

HTH,
Oti.

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http://sports.yahoo.com

Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

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

Have you seen that it requires 
a JNI lib?

Samuele Pedroni.

----- Original Message ----- 
From: Dinu Gherman <gh...@da...>
To: Samuele Pedroni <pe...@in...>
Cc: <jyt...@so...>
Sent: Tuesday, February 26, 2002 9:01 AM
Subject: Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?


> Samuele Pedroni <ped...@bl...>:
> 
> > No this one is not a bug, 
> > chdir is not supported by Jython.
> > Because it is not supported by Java.
> > We could workaround
> > but there is no clear win in that.
> > 
> > It should be noted that while Jython is
> > an implementation of Python and
> > it is a goal that portable code 
> > between Python and Jython
> > (www.anygui.org is example) can be
> > written,
> > 
> > it is not a goal that Python code
> > written without thinking about Jython
> > can be always ported, especially
> > for shell-programming-like programs.
> > 
> > Jython is Python for Java as a platform
> > and tries to follow the platform philosophy
> > without workarounding too much.
> > 
> > So there are tasks for which Python
> > is good and Jython not so much,
> > changing this is a low priority thingy.
> > 
> > regards, Samuele Pedroni.
> 
> 
> Ciao Samuele,
> 
> I see this has been asked before already on this list.
> Sorry for not checking earlier! But I also see that it
> is not impossible to implement chdir and friends in 
> Java despite its security concerns as the following 
> should make clear:
> 
>   http://www.hio.hen.nl/java/nl/nl/hen/ict/unix/Unix.html
> 
> Needless to say, I'd opt for Jython being more similar
> to Python instead of Java, if for no other reason than 
> the higher similarity of the "Jython" string to "Python"
> than to "Java"! ;-)
> 
> Seriously, if it's possible to use chdir-like stuff why
> not add it and make both happy, Java people missing it
> *and* Python folks reusing their scripts...? Maybe some
> Java guys will be more inclined to being dragged over
> to Python?
> 
> Dinu
> 
> 

[Jython-users] using jython inside java

[<ni...@bi...>]

Hi, I want to use jython to make some calculations in my java program and return a result to my jython program. I am creating an instance of jython interpreter in my java program and calling the interpreter's exec method. It do some computatios and create a set of objects. I have to use this set of objects in my java program. I mean jython interpreter MUST return a set to my java program. However, the exec method returns void value. How can I use jython in my java program so that I can use the values that were calculated in jython directly in my java code ? Thx, a lot.

Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

[Dinu G. <gh...@da...>]

Samuele Pedroni <ped...@bl...>:

> No this one is not a bug, 
> chdir is not supported by Jython.
> Because it is not supported by Java.
> We could workaround
> but there is no clear win in that.
> 
> It should be noted that while Jython is
> an implementation of Python and
> it is a goal that portable code 
> between Python and Jython
> (www.anygui.org is example) can be
> written,
> 
> it is not a goal that Python code
> written without thinking about Jython
> can be always ported, especially
> for shell-programming-like programs.
> 
> Jython is Python for Java as a platform
> and tries to follow the platform philosophy
> without workarounding too much.
> 
> So there are tasks for which Python
> is good and Jython not so much,
> changing this is a low priority thingy.
> 
> regards, Samuele Pedroni.


Ciao Samuele,

I see this has been asked before already on this list.
Sorry for not checking earlier! But I also see that it
is not impossible to implement chdir and friends in 
Java despite its security concerns as the following 
should make clear:

  http://www.hio.hen.nl/java/nl/nl/hen/ict/unix/Unix.html

Needless to say, I'd opt for Jython being more similar
to Python instead of Java, if for no other reason than 
the higher similarity of the "Jython" string to "Python"
than to "Java"! ;-)

Seriously, if it's possible to use chdir-like stuff why
not add it and make both happy, Java people missing it
*and* Python folks reusing their scripts...? Maybe some
Java guys will be more inclined to being dragged over
to Python?

Dinu

Re: [Jython-users] java.lang.String becomes PyString

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

From: Delaney, Timothy <tde...@av...>
> > From: Edward Povazan [mailto:epo...@te...]
> > 
> > Thanks for the explanation.
> > I now understand that obj is a String on the java side, but a 
> > PyString on
> > the jython side.
> > The reason I was asking is that I create my user interface widgets in
> > Jython, which includes many custom controls, and sometimes I 
> > need to do
> > object.toString() which of course fails on a PyString.
> > So I need a wrapper around string objects ... a little 
> > annoying. Oh well.
> 
> If you are doing object.toString() in the Python code, you should instead
> use str(object).
> 

True. I can only add that if you subclass a Java class from Jython
then you should define both toString and __repr__/__str__,
toString for java side and the other to make str work.

regards, Samuele Pedroni.

RE: [Jython-users] java.lang.String becomes PyString

[Delaney, T. <tde...@av...>]

> From: Edward Povazan [mailto:epo...@te...]
> 
> Thanks for the explanation.
> I now understand that obj is a String on the java side, but a 
> PyString on
> the jython side.
> The reason I was asking is that I create my user interface widgets in
> Jython, which includes many custom controls, and sometimes I 
> need to do
> object.toString() which of course fails on a PyString.
> So I need a wrapper around string objects ... a little 
> annoying. Oh well.

If you are doing object.toString() in the Python code, you should instead
use str(object).

Tim Delaney

Re: [Jython-users] java.lang.String becomes PyString

[Edward P. <epo...@te...>]

Thanks for the explanation.
I now understand that obj is a String on the java side, but a PyString on
the jython side.
The reason I was asking is that I create my user interface widgets in
Jython, which includes many custom controls, and sometimes I need to do
object.toString() which of course fails on a PyString.
So I need a wrapper around string objects ... a little annoying. Oh well.

-Ed

[Jython-users] How to use PyChecker with Jython

[Alexander J. <aj...@gm...>]

Hi,

Is it possible to use PyChecker from Jython? If it can't check Java 
classes, how can I make PyChecker ignore Java packages? I'have played 
around some with the blacklist PyChecker option but I'm still getting 
import errors and PyChecker doesn't check my python code. Even if I wrap 
all Java class access into another python module, PyChecker still complains 
that it can't find the indirectly imported Java packages and quits without 
checking anything.

Any help would be very much appreciated.

Regards,
Alexander Jerusalem
VKNN

Re: [Jython-users] java.lang.String becomes PyString

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

Maybe you should consider what is really 
happening and consider just to change your
tests:

>>> from java import util,lang
>>> import Cont
>>> c=Cont()
>>> c.set("a")
>>> c.get()
'a'
>>> c.get().__class__
<jclass org.python.core.PyString at 387569>
>>> c.check()
a of java.lang.String
>>> c.set(lang.String("a"))
>>> c.get()
'a'
>>> c.get().__class__
<jclass org.python.core.PyString at 387569>
>>> c.check()
a of java.lang.String

[this behaviour is very unlikey to change]

where Cont is:

public class Cont {

 private Object obj;

 public void set(Object obj) { this.obj = obj; }

 public Object get() { return obj; }

 public void check() {
   System.out.println(obj + " of " + obj.getClass().getName());
 }

}

So yes a java.lang.String becomes a PyString but
also a PyString becomes a java.lang.String when Object
is expected.

regards, Samuele Pedroni.

[Jython-users] »õ·Î¿î ½ÅÈ­ !... ºÎ(Ý£)°¡ À̵¿ÇÑ´Ù.

[½ºÅ¸Å¬·´ <em...@fi...>]

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[Jython-users] java.lang.String becomes PyString

[Edward P. <epo...@te...>]

Does Jython change all java.lang.String objects to PyString automatically.
I have a JList which may contain any object, as well as String.
However in my test cases, all my String objects become PyString after I add
the String to the DefaultListModel I am using.
If I:
class MyString(java.lang.Object):
    def __init__(self,text):
        self.__text=text
    def toString(self):
        return self.__text

then all is well again, but this is extra work I don't need.

Any hints?

Thanks
-Ed

Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

[Samuele P. <ped...@bl...>]

No this one is not a bug, 
chdir is not supported by Jython.
Because it is not supported by Java.
We could workaround
but there is no clear win in that.

It should be noted that while Jython is
an implementation of Python and
it is a goal that portable code 
between Python and Jython
(www.anygui.org is example) can be
written,

it is not a goal that Python code
written without thinking about Jython
can be always ported, especially
for shell-programming-like programs.

Jython is Python for Java as a platform
and tries to follow the platform philosophy
without workarounding too much.

So there are tasks for which Python
is good and Jython not so much,
changing this is a low priority thingy.

regards, Samuele Pedroni.

----- Original Message ----- 
From: Dinu Gherman <gh...@da...>
To: <jyt...@li...>
Sent: Monday, February 25, 2002 6:22 PM
Subject: [Jython-users] OSError: [Errno 0] chdir not supported in Java?


> Hi, 
> 
> I'm just starting to use Jython on OS X and run into several
> problems, obne of them being this:
> 
> [localhost:~] dinu% jython
> Jython 2.1 on java1.3.1 (JIT: null)
> Type "copyright", "credits" or "license" for more information.
> >>> import os
> >>> os.chdir('..')
> Traceback (innermost last):
>   File "<console>", line 1, in ?
>   File "/Applications/Additions/Jython-2.1/Lib/javaos.py", line 56, in chdir
> OSError: [Errno 0] chdir not supported in Java: ..
> >>> 
> 
> Any ideas? 
> 
> Thanks,
> 
> Dinu
> 
> 
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
> 

[Jython-users] OSError: [Errno 0] chdir not supported in Java?

[Dinu G. <gh...@da...>]

Hi, 

I'm just starting to use Jython on OS X and run into several
problems, obne of them being this:

[localhost:~] dinu% jython
Jython 2.1 on java1.3.1 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import os
>>> os.chdir('..')
Traceback (innermost last):
  File "<console>", line 1, in ?
  File "/Applications/Additions/Jython-2.1/Lib/javaos.py", line 56, in chdir
OSError: [Errno 0] chdir not supported in Java: ..
>>> 

Any ideas? 

Thanks,

Dinu

Re: [Jython-users] Applet problem, should be simple...

[Wayne P. <wa...@mi...>]

That was the problem, when I crated the applet I used --jar but not 
--core and it couldn't find jython.jar .  When I used --core and --jar 
it works fine, I also know what the problem with the JDK plugin was.

The site I was visiting (hushmail.com) had an older applet that did not 
use the new permission and access rules for 1.4.  So the plugin was 
working fine, it was just that every site I visited was using older 
versions of applets.

Thanks for all of your help,

Wayne

Syver Enstad wrote:
> Hi Wayne, could you tell us excactly what you do to make the applet.
> 
> I'm thinking of HTML code, where is the jar file, exactly what
> compilation options do you use and so on, I think it would help in
> diagnosing your problem.
> 
> A thought, I didn't see that you used the --core switch to jythonc,
> this is required if you don't provide jython.jar in the list of
> archives in the applet tag in your html code. Btw, the java plugin
> works fine on my machine (win2k pro, ie 6, java 1.4)
> 


-- 
Wayne Pierce
web: http://www.mishre.com
email: wa...@mi...

"What you need to know."

[Jython-users] [±¤°í]Ä®¶ó ÇÚµåÆùÀ» ¹«·á·Î µå¸³´Ï´Ù.

[<cl...@cl...>]

<html>
<head>
<title>=B2=C7=B2=C7=B2=C7=B2=C7=C2=A5!!! =C4=AE=B6=F3=C7=DA=B5=E5=C6=F9=C0=
=CC =B2=C7=C2=A5 =2E=2E=2E=2E</title>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Deuc-kr">=

</head>

<body bgcolor=3D"#ffffff" text=3D"#000000" leftmargin=3D"0" topmargin=3D"0=
"
marginwidth=3D"0" marginheight=3D"0">
<table width=3D"40" border=3D"0" cellspacing=3D"0" cellpadding=3D"0">
  <tr>=20
    <td width=3D"48%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_00=2Egif" width=3D"325"=

height=3D"164"></td>
    <td width=3D"5%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_03=2Egif" width=3D"175"=

height=3D"164"></td>
  </tr>
  <tr>=20
    <td width=3D"48%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_01=2Egif" width=3D"325"=

height=3D"146"></td>
    <td width=3D"5%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_06=2Egif" width=3D"176"=

height=3D"146"></td>
  </tr>
  <tr>=20
    <td width=3D"48%" height=3D"140"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_07=2Egif" width=3D"325"=

height=3D"153"></td>
    <td width=3D"5%" height=3D"140"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_09=2Egif" width=3D"176"=

height=3D"153"></td>
  </tr>
  <tr>=20
   <td width=3D"48%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_10=2Egif" width=3D"325"=

height=3D"157"></td>
    <td width=3D"47%"><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_12=2Egif" width=3D"176"=

height=3D"157"></td>
  </tr>
  <tr>=20
    <td width=3D"48%">&nbsp;</td>
    <td width=3D"5%">&nbsp;</td>
    <td width=3D"47%">&nbsp;</td>
  </tr>
  <tr>=20
    <td width=3D"48%">&nbsp;</td>
    <td width=3D"5%"><a href=3D"http://www=2Eclickij=2Ecom" target=3D'_bla=
nk'><img
src=3D"http://www=2Eclickij=2Ecom/mail/img/img3_17_15=2Egif" width=3D"176"=

height=3D"30" border=3D0></a></td>
    <td width=3D"47%">&nbsp;</td>
  </tr>
  <tr>=20
    <td width=3D"48%">&nbsp;</td>
    <td width=3D"5%">&nbsp;</td>
    <td width=3D"47%">&nbsp;</td>
  </tr>
   <tr>=20
    <td colspan=3D2>=20
=09<div align=3D"center"><A target=3D_blank
href=3D"http://www=2Eclickij=2Ecom/mail/receiver=2Ehtml"><font color=3D"re=
d" size=3D"2"
face=3D"=B5=B8=BF=F2">=BC=F6=BD=C5=B0=C5=BA=CE</font></A>=20
        </div>
    </td>
  </tr>
</table>
</body>
</html>

[Jython-users] Applet probs

[Ben B. <br...@so...>]

Hi,

When I tried to recompile and run a Jython example from the website
(http://www.jython.org) , it compiled ok, but when I tried to run it all =
I
got was and error:

java.lang.NoClassDefFoundError: org/python/core/PyProxy

I know what the error means, I just can=92t for the life of me figure out=
 how
to fix it. If you could help me out, I=92d really appreciate it.

The strange thing about this error, is that I can run the applet of the
site, but when I copy-n-pasted it into the editor, it didn=92t run. That
either means that my computer setup wrong, or the posted source on the si=
te
is wrong.

Thanks in advanced,
Ben

[Jython-users] Swing widgets in Jython repository?

[Edward P. <epo...@te...>]

Hello,

I am curious. Is there a repository of Swing widgets that are implemented in
Jython, anywhere on the web?
I have written a few, and would like to compare code.

-Ed

[Jython-users] re: newbie trying to convert HelloJava3Da to jython

[Tom W. <to...@ss...>]

Ype:

> Date: Thu, 21 Feb 2002 20:06:52 +0100
> To: jyt...@li...
> From: Ype Kingma <yk...@xs...>
> Subject: [Jython-users] Re:  newbie trying to convert HelloJava3Da to
>  jython
>
> Nothing stops you from using 'this' instead of 'self'.
> Using 'self' is only a (widely used) python convention.
>

Except getting my hand slapped by the local Python guru ;-))

tom

--
Tom Whittaker
University of Wisconsin-Madison
Space Science and Eng. Center
ph:  608.262.2759