jython-users — Discussion of and questions about using Jython

Re: [Jython-users] Jython 2.7.0 release standalone jar utterly broken

[Quanah Gibson-M. <qu...@zi...>]

--On Thursday, September 24, 2015 3:14 PM -0700 Quanah Gibson-Mount 
<qu...@zi...> wrote:

> Using the Jython 2.7.0 standalone jar, it is clearly utterly broken and
> missing a ton of previously available functions:
>
>>>> os.getgid()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute 'getgid'
>>>> os.getppid()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute 'getppid'
>
>
> vs 2.5.2:
>
>>>> os.getgid()
> 999
>>>> os.getppid()
> 21334
>
> as well as os.getpid() as noted in <http://bugs.jython.org/issue2405>.
>
> There could well be other basic functionality bits missing, but it seems
> something was overlooked in releasing Jython 2.7.


Same breakage exists in 2.7.1 BETA as well:

Jython 2.7.1 (default:7ebdc6c80d55, Sep 11 2015, 01:50:57)
[OpenJDK 64-Bit Server VM (Oracle Corporation)] on java1.8.0-internal
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.getpid()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'getpid'


--Quanah

--

Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration

[Jython-users] Jython 2.7.0 release standalone jar utterly broken

[Quanah Gibson-M. <qu...@zi...>]

Using the Jython 2.7.0 standalone jar, it is clearly utterly broken and 
missing a ton of previously available functions:

>>> os.getgid()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'getgid'
>>> os.getppid()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'getppid'


vs 2.5.2:

>>> os.getgid()
999
>>> os.getppid()
21334

as well as os.getpid() as noted in <http://bugs.jython.org/issue2405>.

There could well be other basic functionality bits missing, but it seems 
something was overlooked in releasing Jython 2.7.

--Quanah

--

Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration

Re: [Jython-users] Getting error "No module named os" when running jython inside war file

[Quanah Gibson-M. <qu...@zi...>]

--On Wednesday, September 23, 2015 11:45 AM -0700 John Chiang 
<joh...@xa...> wrote:

>
> Hi,
>
>
> I am currently working on a web application which allows user to
> upload/run python script in web application. I copied
> jython-standalone-2.7.0.jar to WEB-INF/lib and build web application as
> war file. however, I get a following error when running a python script:

I think perhaps the 2.7 standalone jar is fundamentally broken as compared 
to prior releases.

See also <http://bugs.jython.org/issue2405>

--Quanah

--

Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration

Re: [Jython-users] Getting error "No module named os" when running jython inside war file

[John C. <joh...@xa...>]

Hi,

I am currently working on a web application which allows user to upload/run
python script in web application. I copied jython-standalone-2.7.0.jar to
WEB-INF/lib and build web application as war file. however, I get a
following error when running a python script:

org.python.core.PyException: null

at org.python.core.Py.ImportError(Py.java:328)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.imp.import_first(imp.java:877)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.imp.import_module_level(imp.java:972)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.imp.importName(imp.java:1062)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.ImportFunction.__call__(__builtin__.java:1280)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.PyObject.__call__(PyObject.java:431)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.__builtin__.__import__(__builtin__.java:1232)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.imp.importOne(imp.java:1081)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.pycode._pyx18.f$0(<script>:11) ~[na:na]

at org.python.pycode._pyx18.call_function(<script>) ~[na:na]

at org.python.core.PyTableCode.call(PyTableCode.java:167)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.PyCode.call(PyCode.java:18)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.Py.runCode(Py.java:1386)
~[jython-standalone-2.7.0.jar!/:na]

at org.python.core.Py.exec(Py.java:1430) ~[jython-standalone-2.7.0.jar!/:na]

at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:276)
~[jython-standalone-2.7.0.jar!/:na]

at
com.xactly.xsql.expression.arithmetic.ProcedureScalarOp.allocate(ProcedureScalarOp.java:92)
~[xsql-0.9.99-SNAPSHOT.jar!/:na]


I found a workaround by running jython installer and setting python.home by
specifying -Dpython.home=<jython install directory> as a JVM parameter. I
think the purpose of using jython-standalone-2.7.0.jar is to be able to run
jython without running installer.

How do I specify jython-standalone-2.7.0.jar as python.home? I think
somehow it needs Lib directory which is inside of jar.


Any recommendations are appreciated. Thanks

On Tue, Sep 22, 2015 at 3:46 PM, John Chiang <joh...@xa...>
wrote:

> Hi,
>
> I am currently working on a web application which allows user to
> upload/run python script in web application. I copied
> jython-standalone-2.7.0.jar to WEB-INF/lib and build web application as war
> file. however, I get a following error when running a python script:
>
> org.python.core.PyException: null
>
> at org.python.core.Py.ImportError(Py.java:328)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.imp.import_first(imp.java:877)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.imp.import_module_level(imp.java:972)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.imp.importName(imp.java:1062)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.ImportFunction.__call__(__builtin__.java:1280)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.PyObject.__call__(PyObject.java:431)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.__builtin__.__import__(__builtin__.java:1232)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.imp.importOne(imp.java:1081)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.pycode._pyx18.f$0(<script>:11) ~[na:na]
>
> at org.python.pycode._pyx18.call_function(<script>) ~[na:na]
>
> at org.python.core.PyTableCode.call(PyTableCode.java:167)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.PyCode.call(PyCode.java:18)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.Py.runCode(Py.java:1386)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.core.Py.exec(Py.java:1430)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:276)
> ~[jython-standalone-2.7.0.jar!/:na]
>
> at
> com.xactly.xsql.expression.arithmetic.ProcedureScalarOp.allocate(ProcedureScalarOp.java:92)
> ~[xsql-0.9.99-SNAPSHOT.jar!/:na]
>
>
> I found a workaround by running jython installer and setting python.home
> by specifying -Dpython.home=<jython install directory> as a JVM parameter.
> I think the purpose of using jython-standalone-2.7.0.jar is to be able to
> run jython without running installer.
>
> How do I specify jython-standalone-2.7.0.jar as python.home? I think
> somehow it needs Lib directory which is inside of jar.
>
>
> Any recommendations are appreciated. Thanks
>
> John
>
>
>

-- 


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[Jython-users] Jython 2.7.1 beta1 released!

[<fwi...@gm...>]

On behalf of the Jython development team, I'm pleased to announce that
Jython 2.7.1 beta1 is released!

Thanks to Amobee for sponsoring my work on Jython, and thanks to the
many contributors to Jython!

Details are here:
http://fwierzbicki.blogspot.com/2015/09/on-behalf-of-jython-development-team-im.html

-Frank

Re: [Jython-users] Import Python class from Java

[Julian K. <jul...@gm...>]

Thx Jim

Looks like a very interesting project. Gonna keep my eye on it. :-)

Regards

On 10 September 2015 at 15:42, Jim Baker <jim...@py...> wrote:

> Julian,
>
> That's probably me in the video you mention (so likely
> https://www.youtube.com/watch?v=hLm3garVQFo)
>
> In that video, I was referencing the Clamp project, which builds on new
> functionality in Jython 2.7 such that we can *precisely* generate the
> Java bytecode produced for Python classes that implement Java interfaces
> and/or extend a Java class. By doing this precise generation, we can ensure
> aspects like Java serializability, construction, and the specific naming,
> so that you can import and use in Java (or other JVM languages).
>
> So this means you would have to modify your class A such that it does the
> requisite implementation/extension. In turn, this implementation/extension
> allows Java code to import and use your Python class - it knows how to call
> your code.
>
> Clamp is demoed here, https://github.com/jimbaker/clamped, and is under
> sporadic development at https://github.com/jythontools/clamp
>
> There are other things to be done, but I see two major missing features:
>
>    - Java annotations. Python classes should be able to support Java
>    annotations on classes and methods, ideally use @-notation - so treating
>    Java annotations as if they are Python decorators. This is just an
>    extension of the precise bytecode generation I mentioned.
>    - Maven jars. Clamp currently supports using sys.path for loading
>    jars, via a jar.pth file in site-packages. (See
>    https://docs.python.org/2/library/site.html on .pth file processing.)
>    Clamp should be able to resolve Maven coordinates, as specified in your
>    package's setup.py, to get jar artifacts, install in site-packages, and
>    thereby place on sys.path. No more telling people, you need to put
>    x.y.z.jar on CLASSPATH.
>
> In my experience, Clamp works well enough, except when building jars on
> Windows, but it needs unit testing and refactoring. (The existing Clamp
> codebase is a good example of a prototype to try out ideas that proved to
> be too successful.) The metaclass approach we use, as inspired by
> SqlAlchemy, has shown itself to be a nice API and we will certainly keep.
> Other aspects are still subject to change, but I suspect any changes will
> be minor at most for users.
>
> - Jim
>
> On Thu, Sep 10, 2015 at 6:37 AM, Julian Kennedy <jul...@gm...>
> wrote:
>
>> Hi Guys
>>
>> I somehow remember seeing a recent video showing directly importing a
>> python class from java. Something along the lines of:
>>
>> import some.python.module.MyClass
>>
>> class A {
>>     // Some java code
>>
>>     MyClass a = new MyClass();
>>
>>     // More java code
>> }
>>
>> Is this correct? Or did I see wrong?
>>
>> Regards
>>
>>
>> ------------------------------------------------------------------------------
>> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
>> Get real-time metrics from all of your servers, apps and tools
>> in one place.
>> SourceForge users - Click here to start your Free Trial of Datadog now!
>> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
>> _______________________________________________
>> Jython-users mailing list
>> Jyt...@li...
>> https://lists.sourceforge.net/lists/listinfo/jython-users
>>
>>
>

Re: [Jython-users] Import Python class from Java

[Jim B. <jim...@py...>]

Julian,

That's probably me in the video you mention (so likely
https://www.youtube.com/watch?v=hLm3garVQFo)

In that video, I was referencing the Clamp project, which builds on new
functionality in Jython 2.7 such that we can *precisely* generate the Java
bytecode produced for Python classes that implement Java interfaces and/or
extend a Java class. By doing this precise generation, we can ensure
aspects like Java serializability, construction, and the specific naming,
so that you can import and use in Java (or other JVM languages).

So this means you would have to modify your class A such that it does the
requisite implementation/extension. In turn, this implementation/extension
allows Java code to import and use your Python class - it knows how to call
your code.

Clamp is demoed here, https://github.com/jimbaker/clamped, and is under
sporadic development at https://github.com/jythontools/clamp

There are other things to be done, but I see two major missing features:

   - Java annotations. Python classes should be able to support Java
   annotations on classes and methods, ideally use @-notation - so treating
   Java annotations as if they are Python decorators. This is just an
   extension of the precise bytecode generation I mentioned.
   - Maven jars. Clamp currently supports using sys.path for loading jars,
   via a jar.pth file in site-packages. (See
   https://docs.python.org/2/library/site.html on .pth file processing.)
   Clamp should be able to resolve Maven coordinates, as specified in your
   package's setup.py, to get jar artifacts, install in site-packages, and
   thereby place on sys.path. No more telling people, you need to put
   x.y.z.jar on CLASSPATH.

In my experience, Clamp works well enough, except when building jars on
Windows, but it needs unit testing and refactoring. (The existing Clamp
codebase is a good example of a prototype to try out ideas that proved to
be too successful.) The metaclass approach we use, as inspired by
SqlAlchemy, has shown itself to be a nice API and we will certainly keep.
Other aspects are still subject to change, but I suspect any changes will
be minor at most for users.

- Jim

On Thu, Sep 10, 2015 at 6:37 AM, Julian Kennedy <jul...@gm...>
wrote:

> Hi Guys
>
> I somehow remember seeing a recent video showing directly importing a
> python class from java. Something along the lines of:
>
> import some.python.module.MyClass
>
> class A {
>     // Some java code
>
>     MyClass a = new MyClass();
>
>     // More java code
> }
>
> Is this correct? Or did I see wrong?
>
> Regards
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>

[Jython-users] Import Python class from Java

[Julian K. <jul...@gm...>]

Hi Guys

I somehow remember seeing a recent video showing directly importing a
python class from java. Something along the lines of:

import some.python.module.MyClass

class A {
    // Some java code

    MyClass a = new MyClass();

    // More java code
}

Is this correct? Or did I see wrong?

Regards

Re: [Jython-users] Jython Question

[Jim B. <jim...@py...>]

Jython has a standard compiler design:

1. Source code is parsed into an abstract syntax tree (AST) using Antlr 3.
The AST represents the source code in a more convenient form, and it can be
accessed and manipulated from Python as well via the standard ast module (
https://docs.python.org/2/library/ast.html)

2. Scope analysis is performed by visiting the AST (recursively walking
this tree). All names are identified with respect to their scope, whether
local or global, including variables that are lexically scoped (closures).

You can see the results of this scoping process in code like the following:

def f():
    x = 6
    def g():
        print "locals in g", locals()
        return x * 7
    print "locals in f", locals()
    return g() * 2

print "globals", globals()
f()

f is a global variable; x and g are locals in the context of f; and x is a
local lexically closed over in g.

3. The AST is recursively walked once more, producing Java bytecode for
every Python construct. If you decompile the produced Java bytecode to
Java, you will notice it is not at all what you have would written if you
were idiomatically translating to Java. This is because the Python language
is inherently dynamic. So this allows you to conditionally define functions
or classes, rebind a function to a given name, and so forth. We don't know
how you would use it, although we have good ideas on how to make this in
some cases much more efficient using the invokedynamic work that came about
in Java 7. It remains future work however. See this video from PyCon 2012
on the ideas we explored: https://www.youtube.com/watch?v=y_cXzaymXm0

The below bytecode corresponds to the slightly simpler

def f():
    x = 6
    def g():
        return x * 7
    return g() * 2

f()


import org.python.compiler.*;
import org.python.core.*;

@APIVersion(36)
@MTime(1441250497000L)
@Filename("scope2.py")
public class scope2$py extends PyFunctionTable implements PyRunnable
{
    static scope2$py self;
    static final PyCode f$0;
    static final PyCode f$1;
    static final PyCode g$2;

    public PyObject f$0(final PyFrame pyFrame, final ThreadState
threadState) {
        pyFrame.setline(1);
        pyFrame.setlocal("f", (PyObject)new PyFunction(pyFrame.f_globals,
Py.EmptyObjects, scope2$py.f$1, (PyObject)null));
        pyFrame.setline(7);
        pyFrame.getname("f").__call__(threadState);
        pyFrame.f_lasti = -1;
        return Py.None;
    }

    public PyObject f$1(final PyFrame pyFrame, final ThreadState
threadState) {
        pyFrame.setline(2);
        pyFrame.setderef(0, (PyObject)Py.newInteger(6));
        pyFrame.setline(3);
        pyFrame.setlocal(0, (PyObject)new PyFunction(pyFrame.f_globals,
Py.EmptyObjects, scope2$py.g$2, (PyObject)null, new PyObject[] {
pyFrame.getclosure(0) }));
        pyFrame.setline(5);
        final PyObject mul =
pyFrame.getlocal(0).__call__(threadState)._mul((PyObject)Py.newInteger(2));
        pyFrame.f_lasti = -1;
        return mul;
    }

    public PyObject g$2(final PyFrame pyFrame, final ThreadState
threadState) {
        pyFrame.setline(4);
        final PyObject mul =
pyFrame.getderef(0)._mul((PyObject)Py.newInteger(7));
        pyFrame.f_lasti = -1;
        return mul;
    }

    public scope2$py(final String s) {
        super();
        scope2$py.self = this;
        f$0 = Py.newCode(0, new String[0], s, "<module>", 0, false, false,
(PyFunctionTable)scope2$py.self, 0, (String[])null, (String[])null, 0,
4096);
        f$1 = Py.newCode(0, new String[] { "g", "x" }, s, "f", 1, false,
false, (PyFunctionTable)scope2$py.self, 1, new String[] { "x" },
(String[])null, 1, 4097);
        g$2 = Py.newCode(0, new String[0], s, "g", 3, false, false,
(PyFunctionTable)scope2$py.self, 2, (String[])null, new String[] { "x" },
0, 4097);
    }

    public PyCode getMain() {
        return scope2$py.f$0;
    }

    public static void main(final String[] array) {
        Py.runMain(CodeLoader.createSimpleBootstrap(new
scope2$py("scope2$py").getMain()), array);
    }

    public static CodeBootstrap getCodeBootstrap() {
        return
PyRunnableBootstrap.getFilenameConstructorReflectionBootstrap((Class)scope2$py.class);
    }

    public PyObject call_function(final int n, final PyFrame pyFrame, final
ThreadState threadState) {
        switch (n) {
            case 0: {
                return this.f$0(pyFrame, threadState);
            }
            case 1: {
                return this.f$1(pyFrame, threadState);
            }
            case 2: {
                return this.g$2(pyFrame, threadState);
            }
            default: {
                return null;
            }
        }
    }
}

The decompiler I'm using is the Procyon decompiler. Also IntelliJ - and
perhaps other IDEs - now include decompilation support.

For more, I recommend reviewing the source code in the compiler package,
starting with
https://github.com/jythontools/jython/blob/master/src/org/python/compiler/CodeCompiler.java

- Jim


On Wed, Sep 2, 2015 at 7:45 PM, sam patterson <sam...@ho...>
wrote:

> Hello,
>
> I stumbled upon the capabilities of Jython and I've become very interested
> in how exactly it works. I understand thus far that the Python source code
> is compiled into Java bytecode, but in laymans terms how does a compiler
> accomplish such things and are there any books or articles that you would
> recommend reading to learn more on the topic?
>
> Many Thanks,
>
> Sam
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>

Re: [Jython-users] Jython Question

[Carl T. <ctr...@gm...>]

Disclaimer - not an expert.

My understanding is that everything is written in Java - the top level
of the process that brings it into something executable by Java is the
parser that identifies the Jython keywords in the scripts:

https://en.wikipedia.org/wiki/Abstract_syntax_tree (Wikipedia article
for parsing with an abstract syntax tree)

The source code for Jython is readily available, but it sounds like
you wanted a broad understanding or way to jump into the topic.  Sorry
if I have assumed too little knowledge on your part.

Carl T.


On Wed, Sep 2, 2015 at 6:45 PM, sam patterson
<sam...@ho...> wrote:
> Hello,
>
> I stumbled upon the capabilities of Jython and I've become very interested
> in how exactly it works. I understand thus far that the Python source code
> is compiled into Java bytecode, but in laymans terms how does a compiler
> accomplish such things and are there any books or articles that you would
> recommend reading to learn more on the topic?
>
> Many Thanks,
>
> Sam
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>

[Jython-users] Jython Question

[sam p. <sam...@ho...>]

Hello,

I stumbled upon the capabilities of Jython and I've become
 very interested in how exactly it works. I understand thus far that the
 Python source code is compiled into Java bytecode, but in laymans terms
 how does a compiler accomplish such things and are there any books or 
articles that you would recommend reading to learn more on the topic?

Many Thanks,

Sam 		 	   		  

[Jython-users] PyDev 4.3.0 released

[Fabio Z. <fa...@gm...>]

Release Highlights:
-------------------------------

* Fixed parser for Python 3.x to support async and await as regular names
too (PyDev-593).

* The new search dialog now has a 'whole word' option which automatically
adds `*` to the search

* Search backend updated to Lucene 5.2.1 (instant searches on huge
codebases)

* When bringing up the search dialog the search text is initially selected.


What is PyDev?
---------------------------

PyDev is an open-source Python IDE on top of Eclipse for Python, Jython and
IronPython development.

It comes with goodies such as code completion, syntax highlighting, syntax
analysis, code analysis, refactor, debug, interactive console, etc.

Details on PyDev: http://pydev.org
Details on its development: http://pydev.blogspot.com


What is LiClipse?
---------------------------

LiClipse is a PyDev standalone with goodies such as support for Multiple
cursors, theming, TextMate bundles and a number of other languages such as
Django Templates, Jinja2, Kivy Language, Mako Templates, Html, Javascript,
etc.

It's also a commercial counterpart which helps supporting the development
of PyDev.

Details on LiClipse: http://www.liclipse.com/



Cheers,

--
Fabio Zadrozny
------------------------------------------------------
Software Developer

LiClipse
http://www.liclipse.com

PyDev - Python Development Environment for Eclipse
http://pydev.org
http://pydev.blogspot.com

PyVmMonitor - Python Profiler
http://www.pyvmmonitor.com/

Re: [Jython-users] putting the python executable on my search path

[Brian R. <bri...@gm...>]

Not really a jython question.

Can't you just add it to your path in you .bashrc?

export PATH=$PATH:/jython2.7.0/bin

Then open a new shell or $source ~/.bashrc

[Jython-users] putting the python executable on my search path

[Bejarano, R. P. <be...@hs...>]

Hello,

I have jython2.7.0 installed on my MacBook, and I want to put the executable, which currently is in the /jython2.7.0/bin directory, on the unix search path.  How do I do this?

Thanks.
Rafael Bejarano

Re: [Jython-users] Convert Str to Float after reading from File

[Jeff E. <jem...@fr...>]

I suggest, this to see if there is whitespace in your Amount string:

   Amount=x[0]
   try:
     x=float(Amount)
   except ValueError:
     print repr(Amount)

You might need strip() after split()

I can't tell what you are trying to accomplish by this, but it's not doing you any good getting to a parsable string.

    ltrg = ';'.join(valueList[12:13])



On 8/8/2015 12:33 PM, Peter O'Reilly wrote:
> I am reading from a file and convert a columns from a list value to a string.
>
> Then I try and convert from a str to a float, but get this error.
> x=float(Amount)
> ValueError: invalid literal for __float__:
>
> If I copy the value from the file and assign it to the str variable(Amount), the float function works as expected.
>
> It seems like it might be some type of encoding issue, anyone else have a  similar problem?  This is the code.
>
> while (lsrc):
>         valueList = lsrc.split(';')
>         ltrg = ';'.join(valueList[12:13])
>         x=ltrg.strip().split('\r\n')
>         Amount=x[0]
>         x=float(Amount)
>
> Thanks,
> PR
>
>
> ------------------------------------------------------------------------------
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

[Jython-users] Convert Str to Float after reading from File

[Peter O'R. <pr...@ya...>]

I am reading from a file and convert a columns from a list value to a string.
Then I try and convert from a str to a float, but get this error.
     x=float(Amount)
ValueError: invalid literal for __float__: 

If I copy the value from the file and assign it to the str variable(Amount), the float function works as expected.
 It seems like it might be some type of encoding issue, anyone else have a  similar problem?  This is the code.

      while (lsrc):
        valueList = lsrc.split(';') 
        ltrg = ';'.join(valueList[12:13])
        x=ltrg.strip().split('\r\n')
        Amount=x[0]
        x=float(Amount)

Thanks,
PR

Re: [Jython-users] Get java.lang.Class type of a class

[Hrishikesh P <hri...@gm...>]

Awesome! Python (jython) keeps exceeding my expectations.

On Thu, Jul 9, 2015 at 11:11 AM, Tim Dudgeon <tdu...@gm...> wrote:

>  I think you just use Test (no .class).
>
> Tim
>
>
> On 09/07/2015 15:48, Hrishikesh P wrote:
>
>  Hi,
>
>  How can I pass in the java class type to a method in Jython?
>
>  What I need to do is:
>
>  for method in tClass.getClass().getDeclaredMethods():
>
>     if method.isAnnotationPresent(Test.class):
>
>         # do something
>
>
>  but I cannot seem to pass in the Test.class as an argument.
>
>
>  Thanks.
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.https://www.gigenetcloud.com/
>
>
>
> _______________________________________________
> Jython-users mailing lis...@li...://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>

Re: [Jython-users] Get java.lang.Class type of a class

[Tim D. <tdu...@gm...>]

I think you just use Test (no .class).

Tim

On 09/07/2015 15:48, Hrishikesh P wrote:
> Hi,
>
> How can I pass in the java class type to a method in Jython?
>
> What I need to do is:
>
> formethod intClass.getClass().getDeclaredMethods():
>
>     if method.isAnnotationPresent(Test.class):
>
>         # do something
>
>
> but I cannot seem to pass in the Test.class as an argument.
>
>
> Thanks.
>
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
>
>
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

[Jython-users] Get java.lang.Class type of a class

[Hrishikesh P <hri...@gm...>]

Hi,

How can I pass in the java class type to a method in Jython?

What I need to do is:

for method in tClass.getClass().getDeclaredMethods():

    if method.isAnnotationPresent(Test.class):

        # do something


but I cannot seem to pass in the Test.class as an argument.


Thanks.

Re: [Jython-users] Jython use cases inside Rackspace, IBM, Oracle, Vert.x

[Fernando C. <fc...@gm...>]

On Tue, Jul 7, 2015 at 9:24 PM, Stefan Richthofer <Ste...@gm...>
wrote:

> My only concern is that a list of logos could be perceived as ads.
> Usually Python-conference sides display logos of their sponsors. And
> actual sponsorship shoud -imho- stay the hurdle to take for getting one's
> logo on some Python main-page, shouldn't it? At least for official pages.
> Maybe a link to popular Jython use-cases could be presented in some neutral
> way, just a (somehow decorated) well visible link "Jython in industry" or
> something.
>

Hi Stefan,

Now that I think about it, perhaps legally it would be too big of a hurdle
to obtain permission to use each and every logo. So, it's much safer to use
company names...

Anyway, is there a wiki or web server playground -like staging.jython.org,
test.jython.org or something- where I could edit such list and preview it
before copying it to the live web site?. I only have experience editing
wikipedia articles... But even if I have to dig into HTML that shouldn't be
a problem....

FC

-- 
During times of Universal Deceit, telling the truth becomes a revolutionary
act
- George Orwell

Re: [Jython-users] Processing now supports python thanks to Jython

[Jonathan F. <jd...@po...>]

Python mode, including its command-line equivalent, "processing.py", is
built using a patched Jython 2.7. The patch monkeys around with the
semantics of longs, silently downcasting them as needed, in order to
support the use of integer constants as colors (as in 0xAARRGGBB) and other
processing-isms.

https://github.com/jdf/processing.py/blob/master/buildtime/lib/jython/jython-patch.diff

Of course, processing.py adds a bunch of Processing stuff to the global
namespace, too.

https://github.com/jdf/processing.py/blob/master/runtime/src/jycessing/core.py

And it goes through all kinds of crap to allow certain Processing keywords
that intersect with Python builtins to work in either context, mostly found
in
https://github.com/jdf/processing.py/blob/master/runtime/src/jycessing/PAppletJythonDriver.java
.

I hope this helps.

On Tue, Jul 7, 2015 at 2:16 PM, Fernando Cassia <fc...@gm...> wrote:

>
> On Sat, Jun 13, 2015 at 9:23 PM, Darjus Loktevic <da...@gm...> wrote:
>
>> http://py.processing.org/
>> Great stuff!
>
>
> But that page doesn´t say anything specific about Jython 2.7.
> I tried googling around "jython" restricting results to the Processing
> site, but only got old pages, nothing new or specific about Processing 2.0
> and Jython 2.7 support. :-(
>
> The closes I got was this wiki page
> https://github.com/processing/processing/wiki/Changes
>
> Which reads: "At the right-hand side of the editor window is a drop-down
> menu that allows you to choose between "Java", "Android", and "JavaScript"
> mode. Those are the current modes that are being included, though we may
> add/remove modes as we head to 2.0 (a Jython mode is lurking about, for
> instance. Mmmm! Tempting.) Like Tools and Libraries, it will be possible
> for other parties to write their own modes that work inside the PDE."
>
> Not too encouraging to read Jython is "lurking about" but not included.
>
> So, can you clarify if latest builds include such Jython mode, and if so,
> can you get in touch with the Processing team and make them -or any other
> contributor to the project for that matter- update the Github wiki to
> include such info and a specific mention of Jython 2.7?.
>
> I think that if Jython 2.7 support is included it´s excellent news, as you
> say, and that the news needs to be spread around loudly!.
>
> Best regards,
> FC
>
>
> --
> During times of Universal Deceit, telling the truth becomes a
> revolutionary act
> Durante épocas de Engaño Universal, decir la verdad se convierte en un
> Acto Revolucionario
> - George Orwell
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>


-- 
Jonathan Feinberg  jd...@po...  http://MrFeinberg.com/

Re: [Jython-users] Jython use cases inside Rackspace, IBM, Oracle, Vert.x

[Stefan R. <Ste...@gm...>]

I am also +1 on this idea. Especially on displaying "Who uses Jython?"

> I volunteer to maintain such list.
Also from me: Thanks for your efforts on it!

My only concern is that a list of logos could be perceived as ads.
Usually Python-conference sides display logos of their sponsors. And
actual sponsorship shoud -imho- stay the hurdle to take for getting one's
logo on some Python main-page, shouldn't it? At least for official pages.
Maybe a link to popular Jython use-cases could be presented in some neutral
way, just a (somehow decorated) well visible link "Jython in industry" or
something.

Regards

-Stefan


> Gesendet: Mittwoch, 08. Juli 2015 um 01:51 Uhr
> Von: "Carl Trachte" <ctr...@gm...>
> An: "Jython Users" <Jyt...@li...>
> Betreff: Re: [Jython-users] Jython use cases inside Rackspace, IBM, Oracle, Vert.x
>
> On Tue, Jul 7, 2015 at 2:31 PM, Fernando Cassia <fc...@gm...> wrote:
> > Looking around I was able to gather a few use cases for Jython at major
> > corporations and corporate products, that I wasn´t previously aware of.
> >
> > The BURP security scanner uses Jython for scripting
> > http://portswigger.net/burp/help/extender.html
> >
> > Jython is used internally by the Vert.x 2 app server, for Python support
> > (see last paragraph)
> > http://vertx.io/vertx2/manual.html
> >
> > Jython is also used by IBM,
> > 1. in its Websphere App Server, for scripting
> > https://www.ibm.com/developerworks/community/wikis/home?lang=en#%21/wiki/Tivoli%20Service%20Request%20Manager/page/Jython%20Scripts
> > 2. in Tivoli SRM
> > http://www.redbooks.ibm.com/Redbooks.nsf/ibmpressisbn/9780137009527?Open
> > 3. in Maximo Asset Management Solution
> > http://www.maximopulse.com/2014/08/14/setting-up-eclipse-for-maximo-automation-scripts-jython-programming/
> >
> > Last year, Oracle added Jython support for spcripting to its FDMEE
> > (Financial Data Quality Management, Enterprise Edition) -previous versions
> > used VBscript
> > http://www.odtug.com/p/bl/et/blogid=1&blogaid=357
> >
> > Oracle also uses Jython in its Oracle Data Integrator (ODI)
> > http://karanbalkar.com/2013/05/tutorial-26-using-jython-in-odi/
> >
> > Oracle also uses Jython in RDIC (Remote Intradoc Client)
> > https://blogs.oracle.com/OracleWebCenterSuite/entry/jython_examples_using_ridc
> >
> > Could these be added to the Jython page, under a "Who uses Jython?" link,
> > featured prominently atop the main page?
> >
> > I know Jim Baker maintains a small list of Jython usage cases in his Github
> > account at
> > https://github.com/jimbaker/talks/blob/master/jython-at-rackspace.md
> >
> > I think it´d be great if at the main page we could implement an horizontally
> > scrolling list of logos of all the firms that use Jython, linking to such
> > wiki list it would greatly help increase its visibility and momentum.
> >
> > I volunteer to maintain such list.
> >
> > It's mind blowing that despite all the hard work by Frank, Jim and the rest
> > of the contributors, Jython needs to be continuously countering FUD (Fear,
> > Uncertainly, and Doubt) saying that "it's dead", as for instance in the
> > following Quora question, until I replied with some facts...
> >
> > http://www.quora.com/Is-Jython-alive
> >
> > Just an idea.
> > FC
> >
> > --
> > During times of Universal Deceit, telling the truth becomes a revolutionary
> > act
> > Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto
> > Revolucionario
> > - George Orwell
> >
> > ------------------------------------------------------------------------------
> > Don't Limit Your Business. Reach for the Cloud.
> > GigeNET's Cloud Solutions provide you with the tools and support that
> > you need to offload your IT needs and focus on growing your business.
> > Configured For All Businesses. Start Your Cloud Today.
> > https://www.gigenetcloud.com/
> > _______________________________________________
> > Jython-users mailing list
> > Jyt...@li...
> > https://lists.sourceforge.net/lists/listinfo/jython-users
> >
> 
> When I worked for defense the US Army was using jython as an API for
> there COMBAT XXI simulation software (written in Java).  My boss at
> the time (he's since moved on to another project management gig)  did
> give a talk on it at Pycon in 2010:
> 
> http://www.slideshare.net/onesimplehuman/python-in-combat-model
> 
> This idea (use cases) is cool.  Thanks for your efforts on it.
> 
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>

Re: [Jython-users] Jython use cases inside Rackspace, IBM, Oracle, Vert.x

[Carl T. <ctr...@gm...>]

On Tue, Jul 7, 2015 at 2:31 PM, Fernando Cassia <fc...@gm...> wrote:
> Looking around I was able to gather a few use cases for Jython at major
> corporations and corporate products, that I wasn´t previously aware of.
>
> The BURP security scanner uses Jython for scripting
> http://portswigger.net/burp/help/extender.html
>
> Jython is used internally by the Vert.x 2 app server, for Python support
> (see last paragraph)
> http://vertx.io/vertx2/manual.html
>
> Jython is also used by IBM,
> 1. in its Websphere App Server, for scripting
> https://www.ibm.com/developerworks/community/wikis/home?lang=en#%21/wiki/Tivoli%20Service%20Request%20Manager/page/Jython%20Scripts
> 2. in Tivoli SRM
> http://www.redbooks.ibm.com/Redbooks.nsf/ibmpressisbn/9780137009527?Open
> 3. in Maximo Asset Management Solution
> http://www.maximopulse.com/2014/08/14/setting-up-eclipse-for-maximo-automation-scripts-jython-programming/
>
> Last year, Oracle added Jython support for spcripting to its FDMEE
> (Financial Data Quality Management, Enterprise Edition) -previous versions
> used VBscript
> http://www.odtug.com/p/bl/et/blogid=1&blogaid=357
>
> Oracle also uses Jython in its Oracle Data Integrator (ODI)
> http://karanbalkar.com/2013/05/tutorial-26-using-jython-in-odi/
>
> Oracle also uses Jython in RDIC (Remote Intradoc Client)
> https://blogs.oracle.com/OracleWebCenterSuite/entry/jython_examples_using_ridc
>
> Could these be added to the Jython page, under a "Who uses Jython?" link,
> featured prominently atop the main page?
>
> I know Jim Baker maintains a small list of Jython usage cases in his Github
> account at
> https://github.com/jimbaker/talks/blob/master/jython-at-rackspace.md
>
> I think it´d be great if at the main page we could implement an horizontally
> scrolling list of logos of all the firms that use Jython, linking to such
> wiki list it would greatly help increase its visibility and momentum.
>
> I volunteer to maintain such list.
>
> It's mind blowing that despite all the hard work by Frank, Jim and the rest
> of the contributors, Jython needs to be continuously countering FUD (Fear,
> Uncertainly, and Doubt) saying that "it's dead", as for instance in the
> following Quora question, until I replied with some facts...
>
> http://www.quora.com/Is-Jython-alive
>
> Just an idea.
> FC
>
> --
> During times of Universal Deceit, telling the truth becomes a revolutionary
> act
> Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto
> Revolucionario
> - George Orwell
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>

When I worked for defense the US Army was using jython as an API for
there COMBAT XXI simulation software (written in Java).  My boss at
the time (he's since moved on to another project management gig)  did
give a talk on it at Pycon in 2010:

http://www.slideshare.net/onesimplehuman/python-in-combat-model

This idea (use cases) is cool.  Thanks for your efforts on it.

[Jython-users] Jython use cases inside Rackspace, IBM, Oracle, Vert.x

[Fernando C. <fc...@gm...>]

Looking around I was able to gather a few use cases for Jython at major
corporations and corporate products, that I wasn´t previously aware of.

The BURP security scanner uses Jython for scripting
http://portswigger.net/burp/help/extender.html

Jython is used internally by the Vert.x 2 app server, for Python support
(see last paragraph)
http://vertx.io/vertx2/manual.html

Jython is also used by IBM,
1. in its Websphere App Server, for scripting
https://www.ibm.com/developerworks/community/wikis/home?lang=en#%21/wiki/Tivoli%20Service%20Request%20Manager/page/Jython%20Scripts
2. in Tivoli SRM
http://www.redbooks.ibm.com/Redbooks.nsf/ibmpressisbn/9780137009527?Open
3. in Maximo Asset Management Solution
http://www.maximopulse.com/2014/08/14/setting-up-eclipse-for-maximo-automation-scripts-jython-programming/

Last year, Oracle added Jython support for spcripting to its FDMEE
(Financial Data Quality Management, Enterprise Edition) -previous versions
used VBscript
http://www.odtug.com/p/bl/et/blogid=1&blogaid=357

Oracle also uses Jython in its Oracle Data Integrator (ODI)
http://karanbalkar.com/2013/05/tutorial-26-using-jython-in-odi/

Oracle also uses Jython in RDIC (Remote Intradoc Client)
https://blogs.oracle.com/OracleWebCenterSuite/entry/jython_examples_using_ridc

Could these be added to the Jython page, under a "Who uses Jython?" link,
featured prominently atop the main page?

I know Jim Baker maintains a small list of Jython usage cases in his Github
account at
https://github.com/jimbaker/talks/blob/master/jython-at-rackspace.md

I think it´d be great if at the main page we could implement an
horizontally scrolling list of logos of all the firms that use Jython,
linking to such wiki list it would greatly help increase its visibility and
momentum.

I volunteer to maintain such list.

It's mind blowing that despite all the hard work by Frank, Jim and the rest
of the contributors, Jython needs to be continuously countering FUD (Fear,
Uncertainly, and Doubt) saying that "it's dead", as for instance in the
following Quora question, until I replied with some facts...

http://www.quora.com/Is-Jython-alive

Just an idea.
FC

-- 
During times of Universal Deceit, telling the truth becomes a revolutionary
act
Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto
Revolucionario
- George Orwell

Re: [Jython-users] Processing now supports python thanks to Jython

[Fernando C. <fc...@gm...>]

On Sat, Jun 13, 2015 at 9:23 PM, Darjus Loktevic <da...@gm...> wrote:

> http://py.processing.org/
> Great stuff!


But that page doesn´t say anything specific about Jython 2.7.
I tried googling around "jython" restricting results to the Processing
site, but only got old pages, nothing new or specific about Processing 2.0
and Jython 2.7 support. :-(

The closes I got was this wiki page
https://github.com/processing/processing/wiki/Changes

Which reads: "At the right-hand side of the editor window is a drop-down
menu that allows you to choose between "Java", "Android", and "JavaScript"
mode. Those are the current modes that are being included, though we may
add/remove modes as we head to 2.0 (a Jython mode is lurking about, for
instance. Mmmm! Tempting.) Like Tools and Libraries, it will be possible
for other parties to write their own modes that work inside the PDE."

Not too encouraging to read Jython is "lurking about" but not included.

So, can you clarify if latest builds include such Jython mode, and if so,
can you get in touch with the Processing team and make them -or any other
contributor to the project for that matter- update the Github wiki to
include such info and a specific mention of Jython 2.7?.

I think that if Jython 2.7 support is included it´s excellent news, as you
say, and that the news needs to be spread around loudly!.

Best regards,
FC


-- 
During times of Universal Deceit, telling the truth becomes a revolutionary
act
Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto
Revolucionario
- George Orwell