Jython

[Heshan]
>    I am having 2 python scripts named methodFinder.py and test1.py . Then
> wrote another script and it is like below

[snip]

>         interp2.exec("import test1");                  //Gives errors
>         interp2.exec("import methodFinder");   //Gives errors

It will be a lot easier for us to help you figure out what is going
wrong if you tell us what the errors are.

Alan.

Hi
   This is the error which I am getting

      Exception in thread "main" Traceback (innermost last):
      File "<string>", line 1, in ?
      ImportError: no module named test1


Heshan Suriyaarachchi

[Heshan]
> Hi
>    This is the error which I am getting
>
>       Exception in thread "main" Traceback (innermost last):
>       File "<string>", line 1, in ?
>       ImportError: no module named test1

OK, the error is an ImportError, so jython is not finding your module.

Have you set the python.path variable in your jython "registry" file,
to point to the directory that contains your modules?

See here for more info on python.path and the registry

http://www.jython.org/docs/registry.html
http://www.jython.org/Project/userfaq.html#my-modules-can-not-be-found-when-imported-from-an-embedded-application

Alan.

The Java code that you posted earlier did an "execfile" on test1.py, but I didn't see where it put test1.py on the Python path. Add code to import sys and print sys.path, that will help.

From: jython-users-bounces@... [mailto:jython-users-bounces@...] On Behalf Of Heshan Suriyaarachchi
Sent: Tuesday, March 25, 2008 9:30 AM
Cc: jython-users@...
Subject: Re: [Jython-users] Importing a python script and evaluating it using another python script, using jython

Hi
   This is the error which I am getting

      Exception in thread "main" Traceback (innermost last):
      File "<string>", line 1, in ?
      ImportError: no module named test1


Heshan Suriyaarachchi

I am working on ubuntu 7.10 and using IntellijIdea as my IDE and I am
working with adding the jython.jar to my project class path . I have not
added an entry to the PATH variable in .bashrc file. Following is what I got
when I added these two lines to my code
        interp.exec("import sys");
        interp.exec("print sys.path");

['/home/heshan/Installations/jython_installer-2.2.1/Lib', '__classpath__']



On Tue, Mar 25, 2008 at 8:33 PM, David Handy <David.Handy@...> wrote:

>  The Java code that you posted earlier did an "execfile" on test1.py, but
> I didn't see where it put test1.py on the Python path. Add code to import
> sys and print sys.path, that will help.
>
>
>

Hi
   Finally I manually copied the two python scripts to the following
classpath

                    /home/heshan/Installations/jython_installer-2.2.1/Lib

   Then the java code executed properly.But the problem now I am having is
that every time if I introduce a new python module I must copy it to the
classpath. Is there a better way that I can do this programatically?

[Heshan]
>    Finally I manually copied the two python scripts to the following
> classpath
>
>                     /home/heshan/Installations/jython_installer-2.2.1/Lib

Don't do that, otherwise you'll be making things difficult for yourself.

>    Then the java code executed properly.But the problem now I am having is
>  that every time if I introduce a new python module I must copy it to the
> classpath.

As I mentioned yesterday, use the setting of the "python.path"
variable in the jython registry. Add the directory containing your
jython files to the value of the python.path variable, like this

python.path = /home/heshan/my_modules/

Or wherever your modules live.

>  Is there a better way that I can do this programatically?

You should not need to do that in these circumstances, if you get your
environment set up properly.

But there can be circumstances where the contents of path can only be
set at runtime. In those cases, it is done like this

import sys
sys.path.append("/home/heshan/my_modules")

Alan.

Thanx guys
      I got my problem solved. thank you very much for your valuable advice
and suggestions.

Heshan Suriyaarachchi

Hi

I am interested in the possibility of use command-style definitions(vs. 
function-style). This is,

I want to known if it is possible  this kind of commands in jython, for 
instance

 >>> ls                -- and not ls() --
ACKNOWLEDGMENTS
CPythonLib
Demo
Doc
LICENSE.txt
Lib
Misc
NEWS
NOTICE.txt
README.txt
Tools
bugtests
build
build.Lib.include.properties
build.xml
dist
maven
registry
src
 >>>

Thanks

josu

Hi again

Just a simple question. Is it possible to change the current dir for the 
jython console?

thanks

josu

2008/3/27, josu <josu@...>:
>  I am interested in the possibility of use command-style definitions(vs.
>  function-style). This is,
>
>  I want to known if it is possible  this kind of commands in jython, for
>  instance
>
>   >>> ls                -- and not ls() --
>  ACKNOWLEDGMENTS
>  CPythonLib
>  Demo

The only way to get this done in the normal interpreter that I know is
the following  hack which doesn't even support arguments.

Jython 2.2 on java1.6.0_03
Type "copyright", "credits" or "license" for more information.
>>> import os
>>>
>>> class LS:
...     def __repr__(self):
...         return '\n'.join(os.listdir('.'))
...
>>>
>>> ls = LS()
>>>
>>> ls
.bashrc
.bash_history
.bash_profile
.emacs
[snip]


Depending on your needs you'd probably be better of using cmd module.
Take a look at the module documentation at [1] or an example at [2]. I
haven't tested cmd on Jython but at least "import cmd" works.

[1] http://docs.python.org/lib/module-cmd.html
[2] http://effbot.org/librarybook/cmd.htm

Cheers,
    .peke

Jython can only do what Java can do.

My understanding is that Java can't change the current directory.

I googled "Java chdir" and and the first hit was a page explaining this.

David H

-----Original Message-----
From: jython-users-bounces@... [mailto:jython-users-bounces@...] On Behalf Of josu
Sent: Thursday, March 27, 2008 7:57 AM
To: jython-users@...
Subject: [Jython-users] Simple question

Hi again

Just a simple question. Is it possible to change the current dir for the
jython console?

thanks

josu

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Refer IPython:
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There is auto-quoting feature:
using ',' as the first character forces auto-quoting of
the rest of the line: 'my_function a b' automatically becomes
'my_function("a","b")'.

Thanks
Shail

> Date: Thu, 27 Mar 2008 12:28:15 +0100
> From: josu@...
> CC: jython-users@...
> Subject: [Jython-users] Command style
> 
> Hi
> 
> I am interested in the possibility of use command-style definitions(vs. 
> function-style). This is,
> 
> I want to known if it is possible  this kind of commands in jython, for 
> instance
> 
>  >>> ls                -- and not ls() --
> ACKNOWLEDGMENTS
> CPythonLib
> Demo
> Doc
> LICENSE.txt
> Lib
> Misc
> NEWS
> NOTICE.txt
> README.txt
> Tools
> bugtests
> build
> build.Lib.include.properties
> build.xml
> dist
> maven
> registry
> src
>  >>>
> 
> Thanks
> 
> josu
> 
> 
> 
> 
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> It's the best place to buy or sell services for
> just about anything Open Source.
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On Thu, Mar 27, 2008 at 11:19 AM, David Handy <David.Handy@...> wrote:
> Jython can only do what Java can do.
>
>  My understanding is that Java can't change the current directory.
This is true for Jython 2.2.* and back.

but... things are a bit more complicated in Jython's trunk -- it is
true that the JVM provides no ability to do a true change directory.
In trunk, Jython now pretends that the directory can be changed
(through os.chdir) and keeps track for Jython internals (so file
access from within Jython like open() behave as if the directory is
changed).  This *does not* change the behavior from the java libraries
-- so from the perspective of (say) java.io.* the current working
directory still cannot be changed.

-Frank