Mailman 3 August 2003 - Distutils-SIG

making Extensions more flexible
by Stefan Seefeld 28 Aug '03

28 Aug '03

hi there, I'v been having problems with extension compilation and I'm looking for ways to enhance the situation. Let me start with an extreme case, where I have an existing C/C++ library with autotools based build system, and I want to provide a python wrapper for that. Let's assume that my library doesn't exist stand-alone, i.e. I want to make it a python module with minimal changes, i.e. for example only a single additional file that provides the interface python <-> C/C++. That's currently not possible, as the 'build_ext' command has a very specific idea of how to process source files into a loadable python module. How can this be enhanced ? I can of course write my own 'build_ext' that is a wrapper around my existing build system, i.e. which calls 'configure', 'make', etc. One of the problems is that there is still the 'Extension' class which is used. With my new 'build_ext', I can't just list the individual src files, as they are opaque to the library I'm wrapping. A way out of this situation would be to allow arbitrary keywords to 'setup()', which are stored as attributes in the 'distribution' object, and then accessible to the commands. So if I add my own attributes *and* my own commands, they can share some specific knowledge. For example class my_build(Command): def run(self): my_data = self.distribution.my_data ...process them... setup(cmdclass={'my_build':my_build}, my_data="some data to be processed by 'my_build'", ...) you get the idea... This covers the extreme case where I have to write my own commands since the existing ones aren't suitable. However, there is already quite a bit that can be done to make the existing 'build_ext' more flexible. For example, I have situations where different source files need different commands to be compiled. Think about the use of 'lex', 'bison', and other tools. This could be achieved in two steps: * provide an abstract 'Target' class that knows how to process its 'input files' * derive 'Extension' from 'Target', and make it be composable out of (sub)targets That would work almost as traditional Makefiles, such that one could compose a tree of targets, each node its own build rules. The variables (CXX, CPPFLAGS, LEX) could still be provided through the 'build_ext' command. What do you think ? Regards, Stefan

2 2

existing documentation
by Stefan Seefeld 28 Aug '03

28 Aug '03

hi there, in contrast to other modules, which contain detailed API references, the distutils documentation seems only to consist of two papers, one explaining how to prepare distributions, the other how to use them. Why is that so ? It took me quite some time even to learn that I can customize and extend the commands, i.e. the setup's 'cmdclass' keyword. It was just nowhere documented (outside the code, of course). Am I missing something ? Regards, Stefan

3 3

Fml status report (Kuser ML)
by Kuser-admin＠kde.gr.jp 27 Aug '03

27 Aug '03

ATTENTION! Your mail is too big, so not processed!!! This ML <Kuser(a)kde.gr.jp> restricts the maximum mail size, so pay attention to the mail with e.g. attachments. --Kuser(a)kde.gr.jp, Be Seeing You! ************************************************************ Help: <mailto:Kuser-ctl@kde.gr.jp?body=help> Unsubscribe: <mailto:Kuser-ctl@kde.gr.jp?body=unsubscribe> If you have any questions or problems, please contact Kuser-admin(a)kde.gr.jp or send e-mail with the body "help"(without quotes) to Kuser-ctl(a)kde.gr.jp (here is the automatic reply, so more preferable) e.g. on a Unix Machine (shell prompt)% echo "help" |Mail Kuser-ctl(a)kde.gr.jp ************************************************************

1 0

Extending Python under Cygwin
by Oleksandr 26 Aug '03

26 Aug '03

Dear Sir/Madam, My name is Oleksandr Zhmudskyy and I am working at Tulane University (Center for Computational Science). I have a problem with Extending Python when I try to use GNU software. I installed Cygwin shell on PC and try to repeat example from Lutz's book (p, 1098-1100): Mark Lutz. Programming Python, O'REILLY. Second Edition. At the bottom of this message you can see these programs for your convenience. The only difference is that path to the Python folder is changed. This example is working Ok on Unix machine (IRIX 6.5) after the next two steps: 1. gcc -g -c hello.c -I/usr/local/include/python2.2 -o hello.o 2. ld -shared hello.o -o hello.so Here I deliberately use command line (not Makefile) in order to simplify the question. At the first step file hello.o is created and on the second one file hello.so. And everything is working. Under the Cygwin shell on PC the first step is Ok: gcc hello.c -g -c -I/usr/include/python2.3/ -shared -o hello.o And I have object file hello.o but the second step gives me mistakes like this: $ ld hello.o -g -I/usr/include/python2.3/ -shared -o hello.so hello.o(.text+0x2a): In function `message':/home/AAZH/MarkLutz/hello.c:14: undefined reference to `PyArg_Parse' hello.o(.text+0x4a):/home/AAZH/MarkLutz/hello.c:17: undefined reference to `strcpy' hello.o(.text+0x5c):/home/AAZH/MarkLutz/hello.c:18: undefined reference to `strcat' hello.o(.text+0x6f):/home/AAZH/MarkLutz/hello.c:19: undefined reference to `Py_BuildValue' hello.o(.text+0xb8): In function `inithello':/home/AAZH/MarkLutz/hello.c:32: undefined reference to `Py_InitModule4' Note that simple GUI applications that don't need Python Extending are working correctly on Cygwin (for example, hello.py or some programs like this). In general we don't need any paths like -I/usr/local/include/python2.2 or -I/usr/include/python2.3/ because they are already installed by Python. I checked this. Also on STI Python we can see this directly: >>> import sys >>> sys.path ['', '/usr/local/opt/Python-2.2.3/lib/python2.2', '/usr/local/opt/Python-2.2.3/lib/python2.2/plat-irix646', '/usr/local/opt/Python-2.2.3/lib/python2.2/lib-tk', '/usr/local/opt/Python-2.2.3/lib/python2.2/lib-dynload', '/usr/local/opt/Python-2.2.3/lib/python2.2/site-packages'] And the same command on Cygwin (PC): >>> import sys >>> sys.path ['', '/usr/lib/python23.zip', '/usr/lib/python2.3', '/usr/lib/python2.3/plat-cygwin', '/usr/lib/python2.3/lib-tk', '/usr/lib/python2.3/lib-dynload', '/usr/lib/python2.3/site-packages'] Would you be so kind to help me? The thing is that installation Python on Cygwin was done correctly: no mistakes. Thank you beforehand. Sincerely, O. Zhmudsky ************************************************************** import hello print hello.message('C') print hello.message('module ' + hello.__file__) for i in range(3): print hello.message(str(i)) ************************************************************** #include </usr/include/python2.3/Python.h> #include <string.h> /* module functions */ static PyObject * /* returns object */ message(PyObject *self, PyObject *args) /* self unused in modules */ { /* args from python call */ char *fromPython, result[64]; if (! PyArg_Parse(args, "(s)", &fromPython)) /* convert Python -> C */ return NULL; /* null=raise exception */ else { strcpy(result, "Hello, "); /* build up C string */ strcat(result, fromPython); /* add passed Python string */ return Py_BuildValue("s", result); /* convert C -> Python */ } } /* registration table */ static struct PyMethodDef hello_methods[] = { {"message", message, 1}, /* method name, C func ptr, always-tuple */ {NULL, NULL} /* end of table marker */ }; /* module initializer */ void inithello() /* called on first import */ { /* name matters if loaded dynamically */ (void) Py_InitModule("hello", hello_methods); /* mod name, table ptr */ } ****************************************

3 2

compiling extension modules with 'make'
by Stefan Seefeld 24 Aug '03

24 Aug '03

hi there, I'v repeatedly tried to convert build systems of my python projects to distutils. As they contain C++ extensions with non-trivial build commands, I failed to get these modules to compile using the default 'Extension(...)' mechanism. I'm now wondering what ways exist to extend distutils such that I can hook up to the old autoconf/make based builds for individual extension modules without the need for manual intervention. I'v seen some packages derive from distutils classes such as distutils.core.Distribution (for example the 4Suite tool) but that looks quite complex so I'm looking for either a simpler way, or some reference manual explaining how to get started. Any hints / links are highly appreciated ! Stefan

2 2

Returned mail: Message to graduate@CS.ColoState.EDU Not Delivered
by Mail Delivery Subsystem 24 Aug '03

24 Aug '03

This is an automatic response to your email. To: <graduate(a)CS.ColoState.EDU> From: <distutils-sig(a)python.org> Date: Sun, 24 Aug 2003 11:56:59 --0600 Subject: Re: Re: My details Try this link (make the message short): mailto:graduate@CS.ColoState.EDU?subject=Add_me_to_your_list Your email was NOT delivered. This means that the recipient has not read your message. If you are trying to send legitimate mail and you're certain that the address is correct sorry for the inconvenience. You may try this: 1 - Send a SHORT email to the recipient with "Add me to your list" in the subject exactly as you see it there. If the message is short it is guaranteed to get through. The link that you see above should work in most situations. 2 - Wait for a reply. The recipient will tell you if you are ok to resend your message. If you are still confused maybe the following Q&A will help clarify things. Q: Why didn't my email get sent? A: Your email was scanned by automatic SPAM detecting software. It determined that it is probably SPAM. There are a number of reasons that this might happen and there is a possibility that legitimate email could get detected as unwanted mail. If this is the case, sorry for the inconvenience. Follow the directions above to request permission to send email to the recipient. Q: Does the recipient know that I've tried to send him/her a message? A: No, the email was intercepted before he/she knew anything about it. Q: Why don't you just accept every message that gets emailed to you like everyone else? This is inconvenient for me. A: If you are trying to send legitimate email I'm sorry for the inconvenience. Anyone who's had an email address for more than a year or two gets unwanted mail and knows that the longer one has an email address the more time is wasted by filtering though it. In some cases the unwanted mail is something that the user may wish that he never saw such as email with immoral content. The postmaster for ecbaldwin.net decided to take the chance that someone's legitimate mail might bounce for the benefit of not having to ever see unwanted mail. Q: Where can I learn about the software that caught my message? A: See http://spamassassin.org

1 0

accessing data files
by Stefan Seefeld 24 Aug '03

24 Aug '03

hi there, I'm creating a package that contains python modules as well as data files. My understanding is that there are options for 'python setup.py install' to specifically tell where to put the data files. How does my python code then know where to look for these files ? Is there a way to generate part of the python code such that these locations are stored and remembered ? Thanks, Stefan

1 0

PORUKA KOJU STE POSLALI SADRZI VIRUS / VIRUS IN YOUR MAIL
by gatekeeper＠EUnet.yu 24 Aug '03

24 Aug '03

ICAgICAgICAgICAgIFUgUCBPIFogTyBSIEUgTiBKIEUgLSBEIEUgVCBFIEsgVCBPIFYgQSBOI CBWIEkgUiBVIFMKICAgICAgICAgICAgICAgICAgICAgICAgICAgICBWIEkgUiBVIFMgIEEgTC BFIFIgVAoKCiAgTmFzIGFudGl2aXJ1cyBzb2Z0dmVyIHByb25hc2FvIGplICB8ICAgT3VyIHZ pcnVzY2hlY2tlciBmb3VuZCB0aGUKCiAgICAgdGhhbmtfeW91LnBpZglwYWNrZWQ6IFBFX1Bh dGNoDQoJcGFja2VkOiBUZUxvY2sNCglpbmZlY3RlZDogSS1Xb3JtLlNvYmlnLmYNCgogIHZpc nVzKGUpIHUgcG9ydWNpIGtvanUgc3RlIHBvc2xhbGkgfCAgIHZpcnVzKGVzKSBpbiB5b3VyIG VtYWlsCiAgbmEgc2xlZGVjZSBhZHJlc2U6ICAgICAgICAgICAgICAgICB8ICAgdG8gdGhlIGZ vbGxvd2luZyByZWNpcGllbnQocyk6CgogICAgIHJvc2tlQG1haW5zdHJlYW0uY28ueXUKCiAg TW9saW1vIHZhcyBkYSBza2VuaXJhdGUgdmFzIHNpc3RlbSB8ICAgUGxlYXNlIGNoZWNrIHlvd XIgc3lzdGVtIGZvcgogIGFudGl2aXJ1cyBzb2Z0dmVyb20gaWxpIG5hcG9tZW5ldGUgfCAgIH ZpcnVzZXMgb3IgYXNrIHlvdXIgc3lzdGVtCiAgdmFzZW0gYWRtaW5pc3RyYXRvcnUgZGEgdG8 gdWNpbmkuICB8ICAgYWRtaW5pc3RyYXRvciB0byBkbyBzby4KCiAgWmFyYXplbmEgcG9ydWth IGplIGlzcG9ydWNlbmEgICAgICB8ICAgVGhlIGluZmVjdGVkIG1lc3NhZ2UgaGFzIGJlZW4KI CBwcmltYW9jKHUvaW1hKSB1IHZpZHUgYXR0YWNobWVudGEsIHwgICBkZWxpdmVyZWQgdG8gdG hlIHJlY2lwaWVudChzKQogIHNhIHBvcnVrb20gdXBvem9yZW5qYS4gICAgICAgICAgICAgfCA gIGFzIGFuIGF0dGFjaG1lbnQgdG8gdGhlIHdhcm5pbmcKICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgIHwgICBtZXNzYWdlLgoKICBQQVpOSkE6IFNhbW9kaXN0cmlidWlyY Wp1Y2kgdmlydXNpIHwgICBBVFRFTlRJT046IFNlbGYtZGlzdHJpYnV0aW5nCiAgY2VzdG8ga2 9yaXN0ZSBsYXpuZSBhZHJlc2UgdSBGcm9tOiB8ICAgdmlydXNlcyBvZnRlbiB1c2UgZmFrZSB hZGRyZXNzZXMKICBwb2xqdSBwb3J1a2EsIHBhIG5pamUgaXNrbGp1Y2VuYSAgIHwgICBpbiBG cm9tOiBmaWVsZCBvZiB0aGUgbWVzc2FnZSwKICBtb2d1Y25vc3QgZGEgamUgemFyYXplbmEgc G9ydWthICAgIHwgICBzbyBpdCBpcyBwb3NzaWJsZSB0aGF0IHRoZQogIHBvc2xhdGEgc2Egcm FjdW5hcmEga29qaSB1IHN2b20gICAgfCAgIGluZmVjdGVkIG1lc3NhZ2Ugd2FzIHNlbnQgZnJ vbQogIGFkcmVzYXJ1IHBvc2VkdWplIHZhc3UgYWRyZXN1LCBiZXogfCAgIGEgaG9zdCB0aGF0 IGNvbnRhaW5zIHlvdXIgYWRkcmVzcwogIHpuYW5qYSBuamVnb3ZvZyB2bGFzbmlrYS4gVWtvb GlrbyAgfCAgIGluIHRoZSBhZGRyZXNzIGJvb2ssIHdpdGhvdXQgaXQncwogIGplIHRvIG92ZG Ugc2x1Y2FqLCBuYWp2ZXJvdmF0bmlqZSAgfCAgIG93bmVyJ3Mga25vd2xlZGdlLiBJZiB0aGl zIGlzIHRoZQogIHZhcyByYWN1bmFyIG5pamUgemFyYXplbi4gICAgICAgICAgfCAgIGNhc2Us IGl0IGlzIG1vc3QgbGlrZWx5IHRoYXQgeW91cgogIE1lZGp1dGltLCBwcmVwb3J1Y3VqZW1vI HZhbSBkYSAgICAgfCAgIGNvbXB1dGVyIGlzIG5vdCBpbmZlY3RlZC4KICBpcGFrIHByb3Zlcm l0ZSB2YXMgc2lzdGVtLiAgICAgICAgIHwgICBIb3dldmVyLCB3ZSByZWNvbW1lbmQgdGhhdCB 5b3UKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHwgICBjaGVjayB5b3Vy IHN5c3RlbSBhbnl3YXkuCgogPT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09P T09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQogPT09PT0gX19fICAgICAgIC AgICAgICAgICAgICAgICAgPSBZVW5ldCBBbnRpdmlydXMgRS1NYWlsIEdhdGV3YXkKID09PT0 gLyAgICAgLyAgLyAgIF9fICAgX19fICBfL18gPT0gRVVuZXQgWXVnb3NsYXZpYSwgWVVuZXQg SW50ZXJuYXRpb25hbAogPT09IC8tLS0gIC8gIC8gIC8gIC8gIC9fXyAgIC8gID09PSA0IE9ia WxpY2V2IFZlbmFjLCAxMTAwMCBCZWxncmFkZSwgWVUKID09IC9fX18gIC9fXy8gIC8gIC8gIC 9fXyAgIC8gID09PT0gcGhvbmU6ICszODEgMTEgMzExOTIzMwogPT0gICAgICAgICAgICAgICA gICAgICAgICAgICAgID09PSBodHRwOi8vd3d3LkVVbmV0Lnl1LwogPT0gQ29ubmVjdGluZyBF dXJvcGUgc2luY2UgMTk4MiA9PSBlLW1haWw6IGdhdGVrZWVwZXJARVVuZXQueXUKID09PT09P T09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT 09PT09PT09PT09PT0KA

1 0

Returned mail: Message to graduate@CS.ColoState.EDU Not Delivered
by Mail Delivery Subsystem 23 Aug '03

23 Aug '03

This is an automatic response to your email. To: <graduate(a)CS.ColoState.EDU> From: <distutils-sig(a)python.org> Date: Sat, 23 Aug 2003 9:41:56 --0600 Subject: Re: Wicked screensaver Try this link (make the message short): mailto:graduate@CS.ColoState.EDU?subject=Add_me_to_your_list Your email was NOT delivered. This means that the recipient has not read your message. If you are trying to send legitimate mail and you're certain that the address is correct sorry for the inconvenience. You may try this: 1 - Send a SHORT email to the recipient with "Add me to your list" in the subject exactly as you see it there. If the message is short it is guaranteed to get through. The link that you see above should work in most situations. 2 - Wait for a reply. The recipient will tell you if you are ok to resend your message. If you are still confused maybe the following Q&A will help clarify things. Q: Why didn't my email get sent? A: Your email was scanned by automatic SPAM detecting software. It determined that it is probably SPAM. There are a number of reasons that this might happen and there is a possibility that legitimate email could get detected as unwanted mail. If this is the case, sorry for the inconvenience. Follow the directions above to request permission to send email to the recipient. Q: Does the recipient know that I've tried to send him/her a message? A: No, the email was intercepted before he/she knew anything about it. Q: Why don't you just accept every message that gets emailed to you like everyone else? This is inconvenient for me. A: If you are trying to send legitimate email I'm sorry for the inconvenience. Anyone who's had an email address for more than a year or two gets unwanted mail and knows that the longer one has an email address the more time is wasted by filtering though it. In some cases the unwanted mail is something that the user may wish that he never saw such as email with immoral content. The postmaster for ecbaldwin.net decided to take the chance that someone's legitimate mail might bounce for the benefit of not having to ever see unwanted mail. Q: Where can I learn about the software that caught my message? A: See http://spamassassin.org

1 0

Copy VHS tapes to CD too! 238889
by 238889＠msn.com 23 Aug '03

23 Aug '03

1 0