Re: [Jython-users] How to install python modules in jthon?

[dman <dsh8290@ri...>]

On Thu, Sep 27, 2001 at 06:42:55AM -0700, R Datta wrote:
| I need to install pyXML but cant, because setup.py asks for distutils, and 
| jython 2.1 doesn't seem to have it. the Distutil page says that it has been 
| part of the distribution since 1.6 .... what gives?

I don't think you can install pyXML anyways, because at least on the
systems I've installed it on it requires expat (a C XML parsing
library).

Hopefully someone will prove me wrong though.

In any case, there are Java implementations of XML parsers that can be
used.  Perhaps someone will wrap a java implementation to conform to
the pyXML interface.

-D

Re: [Jython-users] Catching and showing errors

[Frank Cohen <fcohen@pu...>]

In the words of Rodney: Can't we all just live together?

Other analogies comes to mind: Let the farmer and the cowboy be friends.

I'll keep in mind that I can get the PyTraceback in Jython. But for this
application I'd like to do so in Java. Oh well, I'll keep digging.

-Frank

-- 
Frank Cohen, founder, PushToTest, http://www.pushtotest.com, phone: 408 374 7426
Come to PushToTest for Load, a free open-source tool for performance and
scalability testing and data migration.

> From: Ype Kingma <ykingma@...>
> Date: Sat, 29 Sep 2001 11:16:29 +0100
> To: jython-users@...
> Subject: Re: [Jython-users] Catching and showing errors
> 
>> I'm writing a little utility that will run a Jython script and when it
>> catches an error it will open an editor and jump to the line number that
>> contains the offending script. I'm starting with a Java application and am
>> correctly catching a forced example exception. Jython gives the exception a
>> PyException object. From PyException how may I get a PyTraceback object, so
>> I may get the line number from tb_lineno?

Re: [Jython-users] Catching and showing errors

[Ype Kingma <ykingma@xs...>]

Frank,

>I'm writing a little utility that will run a Jython script and when it
>catches an error it will open an editor and jump to the line number that
>contains the offending script. I'm starting with a Java application and am
>correctly catching a forced example exception. Jython gives the exception a
>PyException object. From PyException how may I get a PyTraceback object, so
>I may get the line number from tb_lineno?

Have look at the traceback module. It's straightforward to do this in
Jython, and I suspect you are getting the hang of doing jython things
directly in java, (which I prefer to avoid :) )...

Have fun,
Ype

Btw. I just started using jEdit: higly recommended, good syntax highlighting
for python code.

[Jython-users] Catching and showing errors

[Frank Cohen <fcohen@pu...>]

I'm writing a little utility that will run a Jython script and when it
catches an error it will open an editor and jump to the line number that
contains the offending script. I'm starting with a Java application and am
correctly catching a forced example exception. Jython gives the exception a
PyException object. From PyException how may I get a PyTraceback object, so
I may get the line number from tb_lineno?

-Frank

-- 
Frank Cohen, founder, PushToTest, http://www.pushtotest.com, phone: 408 374 7426
Come to PushToTest for Load, a free open-source tool for performance and
scalability testing and data migration. 

Re: [Jython-users] Multiple Jython interpreters in different Java threads

[Mats Wichmann <mats@la...>]

At 12:09 PM 9/28/2001 -0400, Barnabas Wolf wrote:
 >I'm trying to add Python scripting capabilities to an existing Java
 >application.  I would need to be able to execute scripts fully
 >independently in different threads.  I've attempted this by creating
 >an instance of PythonInterpreter in each of the threads.  This approach
 >appears to work, but not perfectly.  For example, all interpreters
 >share the same IO streams -- calling setOut(), setErr(), etc. on any
 >of the interpreters will redirect *all* of the interpreters to the
 >new stream.  This particular problem is not a complete show stopper,
 >but it makes me worry about how independent the interpreters really
 >are.

That's the way threads are supposed to work:  separate
threads of control within a single execution context,
which means they have a lot of resources in common,
including open files.

Mats

[Jython-users] Multiple Jython interpreters in different Java threads

[Barnabas Wolf <barnabas_wolf@ms...>]

I'm trying to add Python scripting capabilities to an existing Java
application.  I would need to be able to execute scripts fully
independently in different threads.  I've attempted this by creating
an instance of PythonInterpreter in each of the threads.  This approach 
appears to work, but not perfectly.  For example, all interpreters 
share the same IO streams -- calling setOut(), setErr(), etc. on any 
of the interpreters will redirect *all* of the interpreters to the 
new stream.  This particular problem is not a complete show stopper, 
but it makes me worry about how independent the interpreters really 
are.  Have my spiciest behaved properly only by accident?  Are there 
any other volatile data structures shared by the interpreters?  Is 
there a recommended way to create independent interpreters that I've
overlooked?  (Aside from setting up independent classloaders in a 
sandbox for each thread, which I'd like to avoid)

Any help or suggestions would be appreciated...
Barnabas

[Jython-users] How to install python modules in jthon?

[R Datta <rdatta@cr...>]

I need to install pyXML but cant, because setup.py asks for distutils, and 
jython 2.1 doesn't seem to have it. the Distutil page says that it has been 
part of the distribution since 1.6 .... what gives?



Thanks
Raj Datta
Professional Services                           Direct   : 408-530-4932
CrossAccess Corp                                Cell       : 408-316-5473
2900 Gordon Ave #100                       Fax       : 408-735-0328
Santa Clara CA 95051                         Email   : rdatta@...

Re: [Jython-users] dir() not working

[John Goerzen <jgoerzen@co...>]

"Robert W. Bill" <rbill@...> writes:

> An implementation quirk. If dir() doesn't reveal an object's
> methods, add ".__class__" to get a closer look.

Is that a bug?  It somewhat seems that way to me.  Or is it a fluke
that CPython worked the way it did?

Re: [Jython-users] Embedding jython

[Carlos Quiroz <carlos.quiroz@we...>]

On Wednesday 26 September 2001 23:57, Matt_Conway@... wrote:
Some answers
> Hi all,
>
> I recently discovered jython - I must say, very cool!
>
> I'm trying to embed a jython interpreter within a java application, and I
> have most things working, but have a few questions:
>
> 1) With an embedded interpreter, do I still need the jython distribution
> directory in order for the scripts I run to have access to the standard
> lib (Lib\*.py)?

Yes, or you can create a jar containin al libs and distribute that. In this 
case you have to explictly add the file to sys.path

> 2) How do I add an instance of a Java object to the namespace I pass to
> the PythonInterpreter exec() method?
You can set a variable beforfe

interpeter.set(object, "name")
interpeter.exec("foo(name)")

> 3) How do I programmatically define a python class (and instantiate it)
> and pass it to the interpreter as in (2) ?  By programmatically I mean
> calling a bunch of java methods and _not_ simply evaluating a string that
> has my python class.
Can you explain this a little bit better, do you want to programatically 
define the class interface and implementation?

> 4) W.r.t (2) and (3) what I'm really trying to do is delegate to a Java
> instance from a Python instance so I can default some of the arguments on
> some methods (i.e. make a nicer interface to my java internals for the
> script writers).  Any tips on how to do this?
> 5) I setup my own SecurityManager to deny exits so that scripts can't
> terminate my java process - anyone know of a better way to do this?
Not me at least

> 6) If no to (5), I wrap my script execution in a try/except block to catch
> my DenyExitSecurityException, thus enabling me to swallow the ugly stack
> trace when a script calls exit, however, this only works when the script
> calls the java System.exit(), with sys.exit() I still get the stack trace.
>  Any idea how to stop this before I go digging around in the code?
>
> Any help appreciated, thanks,
>
> Matt
> matt_conway@...
>
>
> _______________________________________________
> Jython-users mailing list
> Jython-users@...
> https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] importing python modules from a jar file

[Samuele Pedroni <pedroni@in...>]

[Ted Berg]
> 
> :) no secrets, but not much of a clue either.  Here's the relevant code, if 
> it helps.
> 
<snip>
> 
> I've put an __init__.py file in both the pyhandlers and nodehandlers 
> directories, but i still get the 'ImportError: no module named ...' errors.  
> ( note that they are suppressed in this code ).
Then I should check that out.

regards.

[Jython-users] Embedding jython

[<Matt_Conway@i2...>]

Hi all,

I recently discovered jython - I must say, very cool!

I'm trying to embed a jython interpreter within a java application, and I 
have most things working, but have a few questions:

1) With an embedded interpreter, do I still need the jython distribution 
directory in order for the scripts I run to have access to the standard 
lib (Lib\*.py)?
2) How do I add an instance of a Java object to the namespace I pass to 
the PythonInterpreter exec() method?
3) How do I programmatically define a python class (and instantiate it) 
and pass it to the interpreter as in (2) ?  By programmatically I mean 
calling a bunch of java methods and _not_ simply evaluating a string that 
has my python class.
4) W.r.t (2) and (3) what I'm really trying to do is delegate to a Java 
instance from a Python instance so I can default some of the arguments on 
some methods (i.e. make a nicer interface to my java internals for the 
script writers).  Any tips on how to do this?
5) I setup my own SecurityManager to deny exits so that scripts can't 
terminate my java process - anyone know of a better way to do this?
6) If no to (5), I wrap my script execution in a try/except block to catch 
my DenyExitSecurityException, thus enabling me to swallow the ugly stack 
trace when a script calls exit, however, this only works when the script 
calls the java System.exit(), with sys.exit() I still get the stack trace. 
 Any idea how to stop this before I go digging around in the code?

Any help appreciated, thanks,

Matt
matt_conway@...

Re: [Jython-users] importing python modules from a jar file

[Ted Berg <tedberg@et...>]

On Wednesday 26 September 2001 13:01, you wrote:
> [Ted Berg]
>
> > > have you an __init__.py or __init__$py.class there?
> >
> > No, I don't.  Do I need to do anything special in the __init__.py file,
> > or does it just need to be there?
>
> Just need to be there. If then it still don't work it's a bug ;)
> or you have other secrets.
>
> regards.

:) no secrets, but not much of a clue either.  Here's the relevant code, if 
it helps.

Essentially every time someone imports or creates a new node in a tree 
control in the application, a new BaseNodehandler subclass is created based 
on info provided in the XML that describes the node.

if, for example, the XML element says it's for a textctrl_handler, the java 
class net.etherstorm.jOpenRPG.nodehandlers.textctrl_handler is created.  If 
the XML element says it's for a alias_handler, the loadJavaNodehandler call 
returns null, and the code tries to load the  
script/pyhandlers/alias_handler.py script included in the jar or, failing 
that,  the <user's home directory>/nodehandlers/alias_handler.py script.

I've put an __init__.py file in both the pyhandlers and nodehandlers 
directories, but i still get the 'ImportError: no module named ...' errors.  
( note that they are suppressed in this code ).

----
<code>
    /**
     * Method declaration
     *
     *
     * @param name
     * @param e
     *
     * @return
     *
     *
     */
    BaseNodehandler loadJavaNodehandler( String name, Element e )
    {
      try
      {
        String classname = "net.etherstorm.jOpenRPG.nodehandlers." + name;
        Class c = getClass().getClassLoader().loadClass( classname );
        Class[] arg_types = 
        {
          Element.class
        };
        java.lang.reflect.Constructor ctor = c.getConstructor( arg_types );
        Object[] args = 
        {
          e
        };
        BaseNodehandler bnh = ( BaseNodehandler )ctor.newInstance( args );
        return bnh;
      }
      catch ( Exception ex )
      {
        /* ExceptionHandler.handleException( ex ); */
        return null;
      }
    }

    /**
     * Method declaration
     *
     *
     * @param name
     * @param e
     *
     * @return
     *
     *
     */
    BaseNodehandler loadInternalPyNodehandler( String name, Element e )
    {
      try
      {
        this.referenceManager.getPythonInterpreter().exec( "import 
java\nimport sys\njava.lang.System.out.println( sys.path )" );
        System.out.println( "using internal python nodehandler" );
        /* this.referenceManager.getPythonInterpreter().exec( "import 
scripts" ); */
        /* this.referencemanager.getpythoninterpreter().exec( "import 
scripts.pyhandlers" ); */
        this.referenceManager.getPythonInterpreter().exec( "import 
pyhandlers" );
        this.referenceManager.getPythonInterpreter().set( "__element", e );
        this.referenceManager.getPythonInterpreter().exec( "__foo = 
pyhandlers." + name + "( __element )" );
        BaseNodehandler bnh = ( BaseNodehandler 
)this.referenceManager.getPythonInterpreter().get( "__foo", 
BaseNodehandler.class );
        System.out.println( bnh );
        System.out.println( 
"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" );
        return bnh;
      }
      catch ( Exception ex )
      {
        /* ExceptionHandler.handleException( ex ); */
        return null;
      }
    }

    /**
     * Method declaration
     *
     *
     * @param name
     * @param e
     *
     * @return
     *
     *
     */
    BaseNodehandler loadExternalPyNodehandler( String name, Element e )
    {
      try
      {
        File f = new File( System.getProperty( "user.home" ) + File.separator 
+ "jopenrpg" + File.separator + "nodehandlers" + File.separator + name + 
".py" );
        if ( f.exists() )
        {
          this.referenceManager.getPythonInterpreter().exec( "import 
nodehandlers" );
          this.referenceManager.getPythonInterpreter().set( "__element", e );
          this.referenceManager.getPythonInterpreter().exec( "__foo = 
nodehandlers." + name + "( __element )" );
          BaseNodehandler bnh = ( BaseNodehandler 
)this.referenceManager.getPythonInterpreter().get( "__foo", 
BaseNodehandler.class );
          return bnh;
        }
        else
        {
          return null;
        }
      }
      catch ( Exception ex )
      {
        /* ExceptionHandler.handleException( ex ); */
        return null;
      }
    }

    /**
     * 
     * 
     * @param name
     * @param e
     * @return
     */
    BaseNodehandler loadHandler( String name, Element e )
    {
      BaseNodehandler bnh = loadJavaNodehandler( name, e );
      if ( bnh == null )
      {
        bnh = loadInternalPyNodehandler( name, e );
        if ( bnh == null )
        {
          bnh = loadExternalPyNodehandler( name, e );
          if ( bnh == null )
          {
            bnh = new UnknownNodehandler( e );
          }
        }
      }
      return bnh;
    }

</code>
----

Re: [Jython-users] importing python modules from a jar file

[Ted Berg <tedberg@et...>]

On Wednesday 26 September 2001 13:13, Carlos Quiroz wrote:
> On Wednesday 26 September 2001 22:09, Ted Berg wrote:
> Hi Ted, could you describe how you load dynamically a java jar, I have had
> some problems to do it
>
> Regards
>

I'm not actually dynamically loading the jar.  the modules are shipped within 
the jar i'm using.

What are you trying to load from the jar on the fly?  I'm not an expert at 
such things, by any means, but I can try to help.

ted

Re: [Jython-users] importing python modules from a jar file

[Carlos Quiroz <carlos.quiroz@we...>]

On Wednesday 26 September 2001 22:09, Ted Berg wrote:
Hi Ted, could you describe how you load dynamically a java jar, I have had 
some problems to do it

Regards

> I have a java application that makes use of jython as a scripting engine. 
> I want to allow the end user to extend the functionality I provide by
> dynamically loading module ( java or python ) at runtime.  The java stuff
> is working fine, but i'm running into a problem with the embedded python.
>
> runtime sys.path looks like this:
> ['.',
> '/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMj
>openrpg.jar!Lib',
> '/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMj
>openrpg.jar!scripts', '/home/tedberg/jopenrpg']
>
> I can import python modules in the directories "Lib" and "scripts" that are
> in the jar.  What I *cannot* do, and *need* to do, is import modules in
> "!scripts/pyhandlers".
>
> I have tried:
> from scripts import pyhandlers
> import scripts.pyhandlers
> import pyhandlers
>
> all of which return a "no module named" referencing scripts and pyhandlers
> respectively.
>
> Also:
> I can do a  "import nodehandlers" ( nodehandlers is a dir in
> /home/tedberg/jopenrpg ), but I cannot import any modules *within* that
> directory.l
>
> What *am* I doing wrong?
>
> ted
>
> _______________________________________________
> Jython-users mailing list
> Jython-users@...
> https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] importing python modules from a jar file

[Ted Berg <tedberg@et...>]

On Wednesday 26 September 2001 12:44, Samuele Pedroni wrote:
> Hi.

<snip>

>
> Given your setup this is the one:
> > import pyhandlers
>
> have you an __init__.py or __init__$py.class there?

No, I don't.  Do I need to do anything special in the __init__.py file, or 
does it just need to be there?

> regards.

Many thanks!

ted

Re: [Jython-users] importing python modules from a jar file

[Samuele Pedroni <pedroni@in...>]

Hi.

[Ted Berg]
> 
> I have a java application that makes use of jython as a scripting engine.  I 
> want to allow the end user to extend the functionality I provide by 
> dynamically loading module ( java or python ) at runtime.  The java stuff is 
> working fine, but i'm running into a problem with the embedded python.
> 
> runtime sys.path looks like this:
> ['.', 
> 
'/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMjopenr
pg.jar!Lib', 
> 
'/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMjopenr
pg.jar!scripts', 
> '/home/tedberg/jopenrpg']
> 
> I can import python modules in the directories "Lib" and "scripts" that are 
> in the jar.  What I *cannot* do, and *need* to do, is import modules in 
> "!scripts/pyhandlers".
> 
> I have tried:
> from scripts import pyhandlers
> import scripts.pyhandlers

Given your setup this is the one:
> import pyhandlers

have you an __init__.py or __init__$py.class there?

regards.

[Jython-users] importing python modules from a jar file

[Ted Berg <tedberg@et...>]

I have a java application that makes use of jython as a scripting engine.  I 
want to allow the end user to extend the functionality I provide by 
dynamically loading module ( java or python ) at runtime.  The java stuff is 
working fine, but i'm running into a problem with the embedded python.

runtime sys.path looks like this:
['.', 
'/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMjopenrpg.jar!Lib', 
'/home/tedberg/.javaws/cache/http/Djopenrpg.sourceforge.net/P80/DMfiles/RMjopenrpg.jar!scripts', 
'/home/tedberg/jopenrpg']

I can import python modules in the directories "Lib" and "scripts" that are 
in the jar.  What I *cannot* do, and *need* to do, is import modules in 
"!scripts/pyhandlers".

I have tried:
from scripts import pyhandlers
import scripts.pyhandlers
import pyhandlers

all of which return a "no module named" referencing scripts and pyhandlers 
respectively.

Also:
I can do a  "import nodehandlers" ( nodehandlers is a dir in 
/home/tedberg/jopenrpg ), but I cannot import any modules *within* that 
directory.l

What *am* I doing wrong?

ted

Re: [Jython-users] Jython resources

[Mats Wichmann <mats@la...>]

 >Tnx for pointing out the wiki Frank. I do hope it becomes useful to folks.
 >
 >Just to clarify, the wiki is not for the book. The book is done, even
 >though it is not in print until December. There will be a website
 >associated with the book that should have additional ramblings that I
 >also hope are helpful. The wiki itself, however, is for my continued
 >work, which is future versions of Jython's online documentation.
 >
 >My previous mail (to Frank) was very unclear (that's a bad sign for a
 >supposed author! <wink> ).
 >
 >This is also a great time to invite people to add to the wiki. It's
 >in it's infancy, so there's lots of room for additions.


The Wiki rather pointedly refers to having been set up in response
to a burst of enthusiasm which seems to have dwindled to nothing
for producing more thorough documentation.

In my own case: guilty (on appearances) as charged.  I've been
wanting to write up several things, and ran into a period where
I've had zero time.

Now that I've been hovering around Jython for a while, mostly
silently, I've noticed that new users crop up all the time
and seem to follow this pattern:

The first experiences with Jython are very easy (classpath
problems notwithstanding...) - and the demos, various examples,
Bruce Eckels' chapter, etc. all make it look great.  Then you
get into serious implementation and there's something that's
unclear, or exposes something that "isn't CPython" or...
My own experiences with converting/extending some Java code ran
into confusion about inner classes, interfaces, etc. all of which
in some sense are the Java designers' efforts to work around
deficiencies in the language (note: that's an /opinion/, if
it's not clear) and don't map perfectly onto Python semantics.

This phase brings a burst of questions.  After those are resolved,
everything's rosy again.  My hope would be that somehow we
can get help for that set of second-level problems, but that's
hard since very many of them seem to be "boundary conditons".
I never found a place where the problems I ran into were described,
but the lists were helpful in helping me understand the issues.
My partial recoding, incidentally, turned into a redesign into
"pure" Python over time...

This is where pointing at the CPython docs doesn't help, and
the existing Jython docs don't help much either.  You  can
always ask on the lists and get a more interactive response,
so perhaps that's okay - for now.  If Jython grows much in
popularity it may not be enough, esp. if people don't find
their way to the lists.

Hopefully, Robert's book will be able to do a lot of filling
the need in this area!

Mats

[Jython-users] FYI: Tutorial posted

[Frank Cohen <fcohen@pu...>]

I posted a brief tutorial on creating and running Java objects from Jython.
Jython is wonderfully easy to do this operation, even so I could have used
some hand-holding while trying it the first time.

The tutorial is posted on:

http://www.jython.org/cgi-bin/moin.cgi/BriefTutorial

and also:

http://www.pushtotest.com/p2t/home.html?igid=G4039&mid=M4031&rid=R4&c=1

-Frank

-- 
Frank Cohen, founder, PushToTest, http://www.pushtotest.com, phone: 408 374 7426
Come to PushToTest for Load, a free open-source tool for performance and
scalability testing and data migration. 

[Jython-users] Jython & distutils

[R Datta <rdatta@cr...>]

Thanks to all who helped me with my threading and list (silly!) questions.

Now I have problems with distutils .. the distutils package doesn't seem to 
be part of the jython distribution, and i cant install the latest distutil 
package because it seems to depend on distutils. I tried just copying the 
directories under <context>/lib ... didn't work.

Thanks

Raj Datta
Professional Services                           Direct   : 408-530-4932
CrossAccess Corp                                Cell       : 408-316-5473
2900 Gordon Ave #100                       Fax       : 408-735-0328
Santa Clara CA 95051                         Email   : rdatta@...

Re: [Jython-users] Jython resources

[Robert W. Bill <rbill@di...>]

Hi all,

On Wed, 26 Sep 2001, Frank Cohen wrote:
> FYI: While learning Jython I found these links to have excellent information
> on Jython:
>
> Robert Bill's book-in-progress on Jython:
> http://www.jython.org/cgi-bin/moin.cgi/JythonDevelDocs

Tnx for pointing out the wiki Frank. I do hope it becomes useful to folks.

Just to clarify, the wiki is not for the book. The book is done, even
though it is not in print until December. There will be a website
associated with the book that should have additional ramblings that I
also hope are helpful. The wiki itself, however, is for my continued
work, which is future versions of Jython's online documentation.

My previous mail (to Frank) was very unclear (that's a bad sign for a
supposed author! <wink> ).

This is also a great time to invite people to add to the wiki. It's
in it's infancy, so there's lots of room for additions. Links to other
Jython docs would be helpful (I've found a couple Jython pages in other
languages, and I'd like to know what they are about).

cheers,
Robert

> The JavaDoc for Jython is at:
> http://www.jython.org./docs/api/overview-summary.html
>
> The PushToTest.com Jython discussion is at:
> http://www.pushtotest.com/p2t/home.html?rid=R4&igid=G4039&c=1
>
> Mark Lutz's Home Page (author of Programming Python):
> http://www.rmi.net/~lutz
>
> Guido and Fred Drake Jr.'s Python Library Reference:
> http://www.python.org/doc/lib/lib.html
>
> Python Tutorial by Fred Drake Jr:
> http://www.python.org/doc/tut/tut.html
>
> -Frank

[Jython-users] Jython resources

[Frank Cohen <fcohen@pu...>]

FYI: While learning Jython I found these links to have excellent information
on Jython:

Robert Bill's book-in-progress on Jython:
http://www.jython.org/cgi-bin/moin.cgi/JythonDevelDocs

The JavaDoc for Jython is at:
http://www.jython.org./docs/api/overview-summary.html

The PushToTest.com Jython discussion is at:
http://www.pushtotest.com/p2t/home.html?rid=R4&igid=G4039&c=1

Mark Lutz's Home Page (author of Programming Python):
http://www.rmi.net/~lutz

Guido and Fred Drake Jr.'s Python Library Reference:
http://www.python.org/doc/lib/lib.html

Python Tutorial by Fred Drake Jr:
http://www.python.org/doc/tut/tut.html

-Frank

-- 
Frank Cohen, founder, PushToTest, http://www.pushtotest.com, phone: 408 374 7426
Come to PushToTest for Load, a free open-source tool for performance and
scalability testing and data migration. 

Re: [Jython-users] dir() not working

[Robert W. Bill <rbill@di...>]

On Wed, 26 Sep 2001, John Goerzen wrote:
> In Jython:
>
> Jython 2.1a3 on java1.1.8 (JIT: null)
> Type "copyright", "credits" or "license" for more information.
> >>> dir("")
> []

An implementation quirk. If dir() doesn't reveal an object's
methods, add ".__class__" to get a closer look.

For example:

>>> dir("".__class__)
['__add__', '__cmp__', '__complex__', '__contains__', '__len__',
'__mod__', '__repr__', '__str__', 'alnum', 'alpha', 'capitalize',
'center', 'classDictInit', 'count', 'decimal', 'digit', 'encode',
'endswith', 'expandtabs', 'find', 'index','isalnum', 'isalpha',
'isdecimal', 'isdigit', 'islower', 'isnumeric', 'isspace', 'istitle',
'isunicode', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'numeric',
'replace', 'rfind', 'rindex', 'rjust', 'rstrip', 'space', 'split',
'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate',
'unicode', 'upper', 'zfill']

> >>> ".".join(['1', '2', '3', '4'])
> '1.2.3.4'
> >>> dir([])
> ['append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']
>
> In Python:
>
> Python 2.0.1 (#0, Jun 23 2001, 23:50:30)
> [GCC 2.95.4 20010319 (Debian prerelease)] on linux2
> Type "copyright", "credits" or "license" for more information.
> >>> dir("")
> ['capitalize', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'index', 'isalnum', 'isalpha', 'isdigit', 'islower', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'replace', 'rfind', 'rindex', 'rjust', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper']
> >>> ".".join(['1', '2', '3', '4'])
> '1.2.3.4'
> >>> dir([])
> ['append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']
>
> Why is Jython's dir() not showing methods that clearly exist?  The
> last version of Python that didn't show those on dir("") didn't
> actually have them.
>
>

[Jython-users] dir() not working

[John Goerzen <jgoerzen@co...>]

In Jython:

Jython 2.1a3 on java1.1.8 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> dir("")
[]
>>> ".".join(['1', '2', '3', '4'])
'1.2.3.4'
>>> dir([])
['append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

In Python:

Python 2.0.1 (#0, Jun 23 2001, 23:50:30)
[GCC 2.95.4 20010319 (Debian prerelease)] on linux2
Type "copyright", "credits" or "license" for more information.
>>> dir("")
['capitalize', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'index', 'isalnum', 'isalpha', 'isdigit', 'islower', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'replace', 'rfind', 'rindex', 'rjust', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper']
>>> ".".join(['1', '2', '3', '4'])
'1.2.3.4'
>>> dir([])
['append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

Why is Jython's dir() not showing methods that clearly exist?  The
last version of Python that didn't show those on dir("") didn't
actually have them.

-- 
John Goerzen <jgoerzen@...>    GPG: 0x8A1D9A1F    http://www.complete.org

[Jython-users] Security Exception on org.python.core.BytecodeLoader2.loadClassFr omBytes

[Lieyong Fu <LFu@Ceon.com>]

With Jython-2.1a3, while trying to load Jython script from with BEA EJB,
I've got the security permission error as attached even though I'had set the
permission to jython.jar in the policy file. Any help is very much
appreciated.

java.lang.reflect.InvocationTargetException: Traceback (innermost last):
  (no code object) at line 0
java.security.AccessControlException: access denied
(java.lang.RuntimePermission get
ProtectionDomain )
        at
java.security.AccessControlContext.checkPermission(AccessControlContext.j
ava, Compiled Code)
        at java.lang.Exception.<init>(Exception.java, Compiled Code)
        at java.lang.RuntimeException.<init>(RuntimeException.java, Compiled
Code)
        at java.lang.SecurityException.<init>(SecurityException.java,
Compiled Code)

        at
java.security.AccessControlException.<init>(AccessControlException.java,
Compiled Code)
        at
java.security.AccessControlContext.checkPermission(AccessControlContext.j
ava, Compiled Code)
        at
java.security.AccessController.checkPermission(AccessController.java, Com
piled Code)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java,
Compiled
Code)
        at java.lang.Class.getProtectionDomain(Class.java:1231)
        at
org.python.core.BytecodeLoader2.loadClassFromBytes(BytecodeLoader2.java)
        at org.python.core.BytecodeLoader.makeClass(BytecodeLoader.java,
Compiled Co
de)
        at org.python.core.BytecodeLoader.makeCode(BytecodeLoader.java)
        at org.python.core.Py.compile_flags(Py.java)
        at org.python.core.Py.compile_flags(Py.java)
        at org.python.core.Py.compile_flags(Py.java)
        at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
        at java.lang.reflect.Method.invoke(Native Method)
        at ProcessToJython.execMethod(ProcessToJython.java, Compiled Code)
        at ProcessToJython.runFile(ProcessToJython.java:103)
        at
examples.ejb.basic.statelessSession.TraderBean.buy(TraderBean.java:118)
        at
examples.ejb.basic.statelessSession.TraderBeanEOImpl.buy(TraderBeanEOImpl
.java:105)
        at
examples.ejb.basic.statelessSession.TraderBeanEOImpl_WLSkel.invoke(Trader
BeanEOImpl_WLSkel.java:75)
        at
weblogic.rmi.extensions.BasicServerObjectAdapter.invoke(BasicServerObject
Adapter.java, Compiled Code)
        at
weblogic.rmi.extensions.BasicRequestHandler.handleRequest(BasicRequestHan
dler.java:77)
        at
weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.jav
a:15)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
Code)

java.security.AccessControlException: java.security.AccessControlException:
access d
enied (java.lang.RuntimePermission getProtectionDomain )