Python with Ecmascript

[jiri.zahradil]

Hello,

for my Python application (Windows platform) to be standards
compliant, I need to embbed Ecmascript(Javascript) interpreter - I
need to execute plugins written in this language. Which engine is
suitable for Python, I have found bunch of them. Any recomendations
are welcome.

To be more specific, I think that plugins will be pretty simple, they
will be used to manipulate my class-based datamodel, no special
libraries dependencies ... therefore I prefer some rather simple
solution ...

Jiri

 

[Phil Thompson]

Hello,

for my Python application (Windows platform) to be standards
compliant, I need to embbed Ecmascript(Javascript) interpreter - I
need to execute plugins written in this language. Which engine is
suitable for Python, I have found bunch of them. Any recomendations
are welcome.

To be more specific, I think that plugins will be pretty simple, they
will be used to manipulate my class-based datamodel, no special
libraries dependencies ... therefore I prefer some rather simple
solution ...

PyQt includes a Javascript interpreter. You can expose Python objects and
properties as Javascript objects and properties.

Phil

 

[Méta-MCI \(MVP\)]

Hi!

Ecmascript (Jscript) is Active-Scripting compliant.
With PyWin32, you can :
- call JScript functions (with parameters)
- define pieces of code (& run it)

Another way, is to drive Internet-Explorer (via COM). You can set the
IE-Windows as invisible, and connect the motor of execution (of
JScript). Then, you can :
- call JScript functions, with parameters et return ; variables, but
also array (<=> lists)
- connect to JScripts's objects (for read/write)
- write new functions in JScript
- etc.

@-salutations

Michel Claveau

 

[Daniel Fetchinson]

Ecmascript (Jscript) is Active-Scripting compliant.

With PyWin32, you can :
- call JScript functions (with parameters)
- define pieces of code (& run it)

Another way, is to drive Internet-Explorer (via COM). You can set the
IE-Windows as invisible, and connect the motor of execution (of
JScript). Then, you can :
- call JScript functions, with parameters et return ; variables, but
also array (<=> lists)
- connect to JScripts's objects (for read/write)
- write new functions in JScript
- etc.

Is there a way to do similar things on linux?

Cheers,
Daniel

 

[Tim Roberts]

for my Python application (Windows platform) to be standards
compliant, I need to embbed Ecmascript(Javascript) interpreter - I
need to execute plugins written in this language.

What standard are you hoping to comply with? I mean, what kind of a
program is this?

 

[Méta-MCI \(MVP\)]

Hi!

Is there a way to do similar things on linux?

I think no. Because these tech use COM. And COM don't exist under xxnux.
But:
- look if XPCOM, or dBus) can help you
- search with the word "MOZLAB", who work a solution (plugin) for
drive Firefox, from an external software.

Good luck!

 

[Daniel Fetchinson]

Is there a way to do similar things on linux?

I think no. Because these tech use COM. And COM don't exist under xxnux.
But:
- look if XPCOM, or dBus) can help you
- search with the word "MOZLAB", who work a solution (plugin) for
drive Firefox, from an external software.

Wow, mozlab is amazing!

Thanks,
Daniel

 

[jiri.zahradil]

What standard are you hoping to comply with? I mean, what kind of a
program is this?

Thats for our speech recognition server - it should executed "tags"
with Javascript code embbeded in some XML grammar format.

I personally does not like COM solution. I prefer some simple library
but may be it is just a hope. I will look to PyQT library and to
Mozilla scripting engine, but I think that this one can get
unnecessarily difficult.

Does anyone work or use something similar?

Jiri

 

[alex23]

I personally does not like COM solution. I prefer some simple library
but may be it is just a hope.

Have you looked at the module 'python-spidermonkey'? It apparently
"allows for the implementation of Javascript classes, objects and
functions in Python, as well as the evaluation and calling of
Javascript scripts and functions".

http://code.google.com/p/python-spidermonkey/

 

[jiri.zahradil]

Have you looked at the module 'python-spidermonkey'? It apparently
"allows for the implementation of Javascript classes, objects and
functions in Python, as well as the evaluation and calling of
Javascript scripts and functions".

http://code.google.com/p/python-spidermonkey/

I have looked at it. It seems to be not fully working version, but I
have not check it properly because the project homepage says "windows
version is forthcoming".

At this time I am considering using some command line interpreter
(maybe jsdb, http://www.jsdb.org/, based on spidermonkey) Idea is to
save script code to file and let it run by interpreter and then parse
the results. Problem is that this approach has very limited access to
variables and objects exposed to javascript (they needs to be
serialized before script run, script cannot call python functions etc)
and also retrieving results is not straigtforward.

Still looking for better solution ...

JZ

 

[sysprv]

Still looking for better solution ...

JZ

How about using Jython and Rhino [http://www.mozilla.org/rhino/] ?
Could be worth your while, if you could live with coding for an older
version of the Python spec.

/sysprv

 

[Alan Isaac]

Is there a way to do similar things on linux?

NJSModule?
http://en.wikipedia.org/wiki/NJS

Alan Isaac

 

[Daniel Fetchinson]

Is there a way to do similar things on linux?

NJSModule?
http://en.wikipedia.org/wiki/NJS

This seems to be very good indeed. Just downloaded njs but the only
njsmodule version I could find was for python 2.1. Does anyone have a
recent copy?

Cheers,
Daniel

 

[Alan Isaac]

NJSModule?

This seems to be very good indeed. Just downloaded njs but the only
njsmodule version I could find was for python 2.1. Does anyone have a
recent copy?

1. You might ask here:
http://lists.njs-javascript.org/cgi-bin/mailman/listinfo/users

2. Did you try to compile it?
Is there anything obviously 2.5 incompatible?

Cheers,
Alan Isaac

 

[Daniel Fetchinson]

NJSModule?

1. You might ask here:
http://lists.njs-javascript.org/cgi-bin/mailman/listinfo/users

2. Did you try to compile it?
Is there anything obviously 2.5 incompatible?

Well, so far I couldn't even compile njs (./configure complains about
HOST setting or some such) so haven't looked at njsmodule yet.

Thanks for the suggestions!
Daniel