Jython

Hi!

I checked out the website:
"We do plan to support bz2, ctypes, sqlite3, flesh out unicodedata,
and support cjk codecs in 2.5.1." <-
(http://www.jython.org/faq3.html)

->Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54)
[OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_18
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named ctypes
>>>

Is there support for ctypes with Jython? Or can I get ctypes working
with Jython somehow?

Thanks :),
Marius

Re: [Jython-users] ctypes in Jython From: Jim Baker <jbaker@zy...> - 2010-11-17 21:37 Attachments: Message as HTML      Sorry for being too optimistic. We ended up not supporting any of those modules in 2.5.1, because we wanted to get some critical bug fixes out first. 2.5.2 is more bug fixes, plus Java integration. There's some experimental support for ctypes in 2.5.2, but it's really more of a placeholder at this point. And none of the other modules mentioned (bz2, CJK codecs, sqlite3, or completion of unicodedata) have been completed either. They might be released on PyPI first as a separate download, or in 2.6. Nothing really too difficult to do, but we don't have the resources since we are an all-volunteer project. Contributions welcome! We do need to update the FAQ of course. I do recommend JNA if you can modify your ctypes code. JNA is pretty close to ctypes - JNA's API apparently was significantly influenced by ctypes! JNA also seems to work well with Jython. The other option is to use something like execnet. For execnet specifically: it allows you to pair Jython with CPython, and it does seem to work well. But its GPL license makes it a non starter for many people. There are other choices out there too. - Jim On Wed, Nov 17, 2010 at 5:24 AM, Marius <wishinet@...> wrote: > Hi! > > I checked out the website: > "We do plan to support bz2, ctypes, sqlite3, flesh out unicodedata, > and support cjk codecs in 2.5.1." <- > (http://www.jython.org/faq3.html) > > ->Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54) > [OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_18 > Type "help", "copyright", "credits" or "license" for more information. > >>> import ctypes > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > ImportError: No module named ctypes > >>> > > Is there support for ctypes with Jython? Or can I get ctypes working > with Jython somehow? > > Thanks :), > Marius > > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today > http://p.sf.net/sfu/msIE9-sfdev2dev > _______________________________________________ > Jython-users mailing list > Jython-users@... > https://lists.sourceforge.net/lists/listinfo/jython-users >

Re: [Jython-users] ctypes in Jython From: josu jugo <josujugo@gm...> - 2010-11-17 22:26 Attachments: Message as HTML      HI About JNA, I can say that we have use it under jython 2.5.x on different projects successfully, although I must add that the projects are not large. regards josu On 2010 aza 17, at 22:37, Jim Baker wrote: > Sorry for being too optimistic. We ended up not supporting any of those modules in 2.5.1, because we wanted to get some critical bug fixes out first. 2.5.2 is more bug fixes, plus Java integration. There's some experimental support for ctypes in 2.5.2, but it's really more of a placeholder at this point. And none of the other modules mentioned (bz2, CJK codecs, sqlite3, or completion of unicodedata) have been completed either. They might be released on PyPI first as a separate download, or in 2.6. Nothing really too difficult to do, but we don't have the resources since we are an all-volunteer project. Contributions welcome! > > We do need to update the FAQ of course. > > I do recommend JNA if you can modify your ctypes code. JNA is pretty close to ctypes - JNA's API apparently was significantly influenced by ctypes! JNA also seems to work well with Jython. > > The other option is to use something like execnet. For execnet specifically: it allows you to pair Jython with CPython, and it does seem to work well. But its GPL license makes it a non starter for many people. There are other choices out there too. > > - Jim > > On Wed, Nov 17, 2010 at 5:24 AM, Marius <wishinet@...> wrote: > Hi! > > I checked out the website: > "We do plan to support bz2, ctypes, sqlite3, flesh out unicodedata, > and support cjk codecs in 2.5.1." <- > (http://www.jython.org/faq3.html) > > ->Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54) > [OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_18 > Type "help", "copyright", "credits" or "license" for more information. > >>> import ctypes > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > ImportError: No module named ctypes > >>> > > Is there support for ctypes with Jython? Or can I get ctypes working > with Jython somehow? > > Thanks :), > Marius > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today > http://p.sf.net/sfu/msIE9-sfdev2dev > _______________________________________________ > Jython-users mailing list > Jython-users@... > https://lists.sourceforge.net/lists/listinfo/jython-users > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today > http://p.sf.net/sfu/msIE9-sfdev2dev_______________________________________________ > Jython-users mailing list > Jython-users@... > https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] ctypes in Jython From: Dan Stromberg <drsalists@gm...> - 2010-11-18 04:00 Attachments: Message as HTML      On Wed, Nov 17, 2010 at 1:37 PM, Jim Baker <jbaker@...> wrote: > There's some experimental support for ctypes in 2.5.2, but it's really more > of a placeholder at this point. > I tried the ctypes module in 2.5.2rc2 recently, and found that: 1) There's no ctypes.util.find_library yet 2) ctypes.Structure doesn't support non-scalar types yet So I agree with the "more of a placeholder" assessment. Still, it's exciting to see it getting started.

Re: [Jython-users] ctypes in Jython From: Safoura <s.seddighin@gm...> - 2011-06-22 15:45 Jim Baker <jbaker <at> zyasoft.com> writes: > > > Sorry for being too optimistic. We ended up not supporting any of those modules in 2.5.1, because we wanted to get some critical bug fixes out first. 2.5.2 is more bug fixes, plus Java integration. There's some experimental support for ctypes in 2.5.2, but it's really more of a placeholder at this point. And none of the other modules mentioned (bz2, CJK codecs, sqlite3, or completion of unicodedata) have been completed either. They might be released on PyPI first as a separate download, or in 2.6. Nothing really too difficult to do, but we don't have the resources since we are an all-volunteer project. Contributions welcome! > > > > > We do need to update the FAQ of course. > I do recommend JNA if you can modify your ctypes code. JNA is pretty close to ctypes - JNA's API apparently was significantly influenced by ctypes! JNA also seems to work well with Jython. > > > The other option is to use something like execnet. For execnet specifically: it allows you to pair Jython with CPython, and it does seem to work well. But its GPL license makes it a non starter for many people. There are other choices out there too. > > > - JimOn Wed, Nov 17, 2010 at 5:24 AM, Marius <wishinet <at> googlemail.com> wrote: > > Hi! > I checked out the website: > "We do plan to support bz2, ctypes, sqlite3, flesh out unicodedata, > and support cjk codecs in 2.5.1." <- > (http://www.jython.org/faq3.html) > ->Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54) > [OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_18 > Type "help", "copyright", "credits" or "license" for more information. > >>> import ctypes > Traceback (most recent call last): >  File "<stdin>", line 1, in <module> > ImportError: No module named ctypes > >>> > Is there support for ctypes with Jython? Or can I get ctypes working > with Jython somehow? > Thanks :), > Marius > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1,  ECMAScript5, and DOM L2 & L3. > Spend less time writing and  rewriting code and more time creating great > experiences on the web. Be a part of the beta todayhttp://p.sf.net/sfu/msIE9- sfdev2dev > _______________________________________________ > Jython-users mailing listJython-users <at> lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/jython-users > > > > > > > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today > http://p.sf.net/sfu/msIE9-sfdev2dev > > _______________________________________________ > Jython-users mailing list > Jython-users <at> lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jython-users > Hi Jim, As I was doing some research for my problem, I found this post and joined this mailing list. I need to communicate with some device which I have a perfectly working Python module for. I also have an extensive Java program which needs to talk to the device and I thought I just call the perfect python module functions from the already existing Java code. Therefore I have been looking for a way to call the Python module lib's functions from Java and found out that Jython is designed to do that. However, the Python module uses "PyUSB" library which apparently uses ctypes to communicate with native libraries in Python. Now is it true that I won't simply be able to continue this project any more because ctypes is not supported in Jython? I was so excited about this but now don't know how to go further. If that is the case, is there any thing other than Jython that you could suggest as a solution, by any chance? Any comment/suggestion would be greatly appreciated. Thanks so much Safi

Re: [Jython-users] ctypes in Jython From: Alex Grönholm <alex.gronholm@ne...> - 2011-06-22 16:51 22.06.2011 18:42, Safoura kirjoitti: > Jim Baker<jbaker<at> zyasoft.com> writes: > >> >> Sorry for being too optimistic. We ended up not supporting any of those > modules in 2.5.1, because we wanted to get some critical bug fixes out first. > 2.5.2 is more bug fixes, plus Java integration. There's some experimental > support for ctypes in 2.5.2, but it's really more of a placeholder at this > point. And none of the other modules mentioned (bz2, CJK codecs, sqlite3, or > completion of unicodedata) have been completed either. They might be released on > PyPI first as a separate download, or in 2.6. Nothing really too difficult to > do, but we don't have the resources since we are an all-volunteer project. > Contributions welcome! >> >> >> >> We do need to update the FAQ of course. >> I do recommend JNA if you can modify your ctypes code. JNA is pretty close to > ctypes - JNA's API apparently was significantly influenced by ctypes! JNA also > seems to work well with Jython. >> >> The other option is to use something like execnet. For execnet specifically: > it allows you to pair Jython with CPython, and it does seem to work well. But > its GPL license makes it a non starter for many people. There are other choices > out there too. >> >> - JimOn Wed, Nov 17, 2010 at 5:24 AM, Marius<wishinet<at> googlemail.com> > wrote: >> Hi! >> I checked out the website: >> "We do plan to support bz2, ctypes, sqlite3, flesh out unicodedata, >> and support cjk codecs in 2.5.1."<- >> (http://www.jython.org/faq3.html) >> ->Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54) >> [OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_18 >> Type "help", "copyright", "credits" or "license" for more information. >>>>> import ctypes >> Traceback (most recent call last): >> File "<stdin>", line 1, in<module> >> ImportError: No module named ctypes >> Is there support for ctypes with Jython? Or can I get ctypes working >> with Jython somehow? >> Thanks :), >> Marius >> ------------------------------------------------------------------------------ >> Beautiful is writing same markup. Internet Explorer 9 supports >> standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2& L3. >> Spend less time writing and rewriting code and more time creating great >> experiences on the web. Be a part of the beta todayhttp://p.sf.net/sfu/msIE9- > sfdev2dev >> _______________________________________________ >> Jython-users mailing listJython-users<at> > lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/jython-users >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> Beautiful is writing same markup. Internet Explorer 9 supports >> standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2& L3. >> Spend less time writing and rewriting code and more time creating great >> experiences on the web. Be a part of the beta today >> http://p.sf.net/sfu/msIE9-sfdev2dev >> >> _______________________________________________ >> Jython-users mailing list >> Jython-users<at> lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jython-users >> > Hi Jim, > As I was doing some research for my problem, I found this post and joined this > mailing list. > I need to communicate with some device which I have a perfectly working Python > module for. I also have an extensive Java program which needs to talk to the > device and I thought I just call the perfect python module functions from the > already existing Java code. > Therefore I have been looking for a way to call the Python module lib's > functions from Java and found out that Jython is designed to do that. > However, the Python module uses "PyUSB" library which apparently uses ctypes to > communicate with native libraries in Python. > Now is it true that I won't simply be able to continue this project any more > because ctypes is not supported in Jython? I was so excited about this but now > don't know how to go further. > If that is the case, is there any thing other than Jython that you could suggest > as a solution, by any chance? > Any comment/suggestion would be greatly appreciated. Try Py4J. It will bridge CPython and Jython so you can use stuff from both. > Thanks so much > Safi > > > > ------------------------------------------------------------------------------ > Simplify data backup and recovery for your virtual environment with vRanger. > Installation's a snap, and flexible recovery options mean your data is safe, > secure and there when you need it. Data protection magic? > Nope - It's vRanger. Get your free trial download today. > http://p.sf.net/sfu/quest-sfdev2dev > _______________________________________________ > Jython-users mailing list > Jython-users@... > https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] ctypes in Jython From: Safoura <s.seddighin@gm...> - 2011-06-23 18:14 > > Hi Jim, > > As I was doing some research for my problem, I found this post and joined this > > mailing list. > > I need to communicate with some device which I have a perfectly working Python > > module for. I also have an extensive Java program which needs to talk to the > > device and I thought I just call the perfect python module functions from the > > already existing Java code. > > Therefore I have been looking for a way to call the Python module lib's > > functions from Java and found out that Jython is designed to do that. > > However, the Python module uses "PyUSB" library which apparently uses ctypes to > > communicate with native libraries in Python. > > Now is it true that I won't simply be able to continue this project any more > > because ctypes is not supported in Jython? I was so excited about this but now > > don't know how to go further. > > If that is the case, is there any thing other than Jython that you could suggest > > as a solution, by any chance? > > Any comment/suggestion would be greatly appreciated. > Try Py4J. It will bridge CPython and Jython so you can use stuff from both. > > Thanks so much > > Safi > > > > > > Hi Thanks for introducing Py4J; I went through the docs. But isn't that for accessing the Java objects from a python program and the other way around. As I mentioned, I need to find a way to call the Python lib functions from my running Java code. Would it be still an option? How about Jepp? Could that be a solution too? Thanks so much in advance. Safi

Re: [Jython-users] ctypes in Jython From: Chris Clark <Chris.Clark@in...> - 2011-06-23 18:41 Safoura wrote: > Thanks for introducing Py4J; I went through the docs. But isn't that for > accessing the Java objects from a python program and the other way around. As I > mentioned, I need to find a way to call the Python lib functions from my running > Java code. Would it be still an option? How about Jepp? Could that be a solution > too? > I've used http://pypi.python.org/pypi/RPyC/ a few times and I've had pretty good success with it (in both directions, my pure Jython JDBC driver works great being accessed from Cpython [the reverse of what you want]). There are a bunch of others (execnet, SPyRO, and SPIRO). A ctypes module based on top if JNA would be neat :-) That would be a a great project as others could use it later on (I've not looked in the the Jython initial ctypes implementation so if you want to hack on something also consider hacking on the current ctypes code in Jython). Chris

Re: [Jython-users] ctypes in Jython From: Chris Clark <Chris.Clark@in...> - 2011-06-23 18:54 Chris Clark wrote: > Safoura wrote: >> Thanks for introducing Py4J; I went through the docs. But isn't that >> for accessing the Java objects from a python program and the other >> way around. As I mentioned, I need to find a way to call the Python >> lib functions from my running Java code. Would it be still an option? >> How about Jepp? Could that be a solution too? >> > > I've used http://pypi.python.org/pypi/RPyC/ a few times and I've had > pretty good success with it (in both directions, my pure Jython JDBC > driver works great being accessed from Cpython [the reverse of what > you want]). > > There are a bunch of others (execnet, SPyRO, and SPIRO). RE RPyC calling Cpython from Jython, I forgot to add that the version I had raised errors on method calls (it was fine in the other direction), but using .__call__() always worked fine. I never got around to going any further (e.g. logging a bug report) as I was playing around and got what I needed to do work. Chris

Re: [Jython-users] ctypes in Jython From: Alan Kennedy <jython-dev@xh...> - 2011-06-23 19:34 [Safoura] > I need to communicate with some device which I have a perfectly working Python > module for. I also have an extensive Java program which needs to talk to the > device and I thought I just call the perfect python module functions from the > already existing Java code. > Therefore I have been looking for a way to call the Python module lib's > functions from Java and found out that Jython is designed to do that. > However, the Python module uses "PyUSB" library which apparently uses ctypes to > communicate with native libraries in Python. Have you considered porting that python USB code to a java USB library? They would probably have similar APIs, and might even use the same underlying native library, if the java lib uses JNA. http://stackoverflow.com/questions/862880/java-usb-library Alan.

Re: [Jython-users] ctypes in Jython From: Dan Stromberg <drsalists@gm...> - 2011-06-24 02:14 Attachments: Message as HTML      On Wed, Jun 22, 2011 at 8:42 AM, Safoura <s.seddighin@...> wrote: > > > However, the Python module uses "PyUSB" library which apparently uses > ctypes to > communicate with native libraries in Python. > Now is it true that I won't simply be able to continue this project any > more > because ctypes is not supported in Jython? > Jython has a ctypes module - it's just kind of young: $ /usr/local/jython-2.5.2/bin/jython -c 'import ctypes; print ctypes' <module 'ctypes' from '/usr/local/jython-2.5.2/Lib/ctypes/__init__.py'>

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