jython-users

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

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

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

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

I've been wrestling with the same problem, just posted to 
jython-dev about it in fact.

As far as I can tell, what you want to do is not supported but
you can add support with the following patch to
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;
>

Then you need to add the standard modules to the jython.jar file.
I have an ant file that does this if you're interested.

-----Original Message-----
From: Antonio Rodriguez [mailto:An...@ho...]
Sent: Sunday, September 16, 2001 10:40 PM
To: jyt...@li...; ds...@ri...
Subject: Re: [Jython-users] import from jar--clarification


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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Jyt...@li...
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RE: [Jython-users] import from jar--clarification

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

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
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

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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
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

_______________________________________________
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Jyt...@li...
https://lists.sourceforge.net/lists/listinfo/jython-users

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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

[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. 

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

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

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
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

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