Mailman 3 August 2003 - Python-Dev

New bug in listobject.c
by Tim Peters 15 Aug '03

15 Aug '03

list_ass_slice() currently looks like: ... int n; /* Size of replacement list */ int d; /* Change in size */ int k; /* Loop index */ #define b ((PyListObject *)v) if (v == NULL) n = 0; else { char msg[256]; if (a == b) { /* Special case "a[i:j] = a" -- copy b first */ int ret; v = list_slice(b, 0, n); MSVC complains that n can be used before initialization in the last line. Looks like a fair complaint to me! SF ViewCVS doesn't show this code, so it must be very new.

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autoconf's AM_CHECK_FUNCS breaks python2.3 on HPUX 11.11
by Matthias Klose 15 Aug '03

15 Aug '03

Reported to the autoconf developers, but it badly breaks python2.3 on HPUX 11.11. The test for AC_CHECK_FUNCS(mktime, strftime, strptime, select) and some other time functions is broken on HPUX 11.11. The test snippet #ifdef __STDC__ # include <limits.h> #else # include <assert.h> #endif includes sys/time.h, which contains the declarations for the above functions (among others). Changing this to #if defined(__STDC) && !defined(__hpux__) fixes this (although I don't know, if autoconf may use the "defined" syntax). There is at least one more function not detected by this change: gettimeofday. I didn't investigate yet, but hand edited pyconfig.h. Maybe the generated configure could be hand-edited for releases or a note added for the platform specific notes. Matthias

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ANN: Job posting -- developer position available
by eric jones 15 Aug '03

15 Aug '03

Hey group, We have a developer position open here at Enthought, and I thought I'd see if anyone is interested. The posting is below. There is also a tech writer and HCI opening listed on the website: http://www.enthought.com/careers.html thanks! eric Position: Python Developer Type: Full-Time Enthought, Inc. is a technology startup in the Austin, TX area that is looking for a motivated Python Developer to join our development team. Responsibilities include developing and deploying scientific applications within the Fortune 500. Our size and prospects provide significant opportunity for growth and advancement for Enthought employees. Candidates should have the following qualifications: - BS or MS in Computer Science or Engineering or other scientific field - 3+ years experience in the software industry - Experience developing solutions in the following languages: - Python - C/C++ - User interface design experience - Developing and deploying custom solutions for clients - Excellent verbal and written communication skills Ideal candidates will also demonstrate the following skills: - Use of the wxPython user interface library - Experience with Geophysics applications - Experience in the fields of statistics, linear algebra and calculus Please send resumes to jobs(a)enthought.com.

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map(None, ...) in tutorial
by Neil Schemenauer 15 Aug '03

15 Aug '03

I've noticed this section in the tutorial: [...], we see that map(None, list1, list2) is a convenient way of turning a pair of lists into a list of pairs. For example: >>> map(None, seq, map(square, seq)) [(0, 0), (1, 1), (2, 4), (3, 9), (4, 16), (5, 25), (6, 36), (7, 49)] I think the example be changed to use zip() instead, ie: >>> zip(seq, map(square, seq)) [(0, 0), (1, 1), (2, 4), (3, 9), (4, 16), (5, 25), (6, 36), (7, 49)] Any objections? Neil

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filter(bool, ...)
by Neil Schemenauer 14 Aug '03

14 Aug '03

I just realized that filter(bool, ...) is the same as filter(None, ...). Anyone object to optimizing the 'bool' case? I think using 'bool' is much clearer than 'None'. Neil Index: Python/bltinmodule.c =================================================================== RCS file: /cvsroot/python/python/dist/src/Python/bltinmodule.c,v retrieving revision 2.293 diff -u -r2.293 bltinmodule.c --- Python/bltinmodule.c 2 Aug 2003 07:42:56 -0000 2.293 +++ Python/bltinmodule.c 14 Aug 2003 17:49:26 -0000 @@ -197,7 +197,7 @@ break; } - if (func == Py_None) { + if (func == Py_None || func == (PyObject *)&PyBool_Type) { ok = PyObject_IsTrue(item); } else {

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g_ascii_strtod/snprintf and Python
by Christian Reis 14 Aug '03

14 Aug '03

Hello Alex, how's it going? I'm assuming Johan has talked to you about this issue we're pursuing on python-dev to make Python LC_NUMERIC-safe (if not, the PEP I wrote is attached, and it has details and a number of references). Basically, we're changing Python to stop depending on having the C locale set for the LC_NUMERIC category -- the parser and Int/Float and String objects currently rely on glibc versions of strtod/atof and snprintf, and this is a problem specifically for C extensions that link to python in runtime (which depend on LC_NUMERIC being set correctly to be able to localize correctly). Gustavo Carneiro started work on a patch to implement this a while back. We'd really like to use (and his prototype patch indeed does) the LC_NUMERIC-safe versions that you wrote for glib, but python-dev has been clear that they really need the original author to contribute the code (and sign the PSF license). So I'm writing to ask if you'd be kind enough to help us out and comply with the steps required to contribute the code. Basically (AFAICT, and someone please correct me if I'm wrong) this means checking out http://www.python.org/psf/psf-contributor-agreement.html and filling out the Python Contributor Agreement, and mailing it in to the PSF. This would allow you to check in the code in question (at which point we would be a lot closer to having this fixed for good.) [PS: Does anyone on python-dev (Martin, Barry perhaps?) have any further comments on the process that we should go through to move on with this?] Thanks for any help you can provide us. Take care, -- Christian Reis, Senior Engineer, Async Open Source, Brazil. http://async.com.br/~kiko/ | [+55 16] 261 2331 | NMFL

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Building 2.1.3 on RH9
by Dennis Allison 14 Aug '03

14 Aug '03

Seems to be broken -- at least _socket does not build correctly because of openssl changes. (Arggh... ) Where should this be reported?

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Forward declaration of PyObject* values
by Tom Emerson 13 Aug '03

13 Aug '03

I'm working on an application (in C++) that conditionally embeds Python. Some of the (C++) classes include PyObject*'s only when embedding Python. In other cases these aren't here. I do not want to include Python.h in the header files for these classes because not all of the clients of these classes use the Python functionality. Hence I would like to forward declare PyObject so it can be used as an opaque type in these interfaces, and only have Python.h included in those source files that actually need it. This comes up because Python.h needs to be included before any system interfaces, lest you get various compiler warnings (cf. sf issue 637321 related to the redefinition of _POSIX_C_SOURCE) but struct PyObject; doesn't work, at least in GCC 3.2.2: ../include/bt_notice.h:31: conflicting types for `struct PyObject' ../../../third-party-tools/python/include/python2.3/object.h:104: previous declaration as `typedef struct _object PyObject' make: *** [obj_g/RH72-gcc-3.2/bt_notice.o] Error 1 Since I would rather not have to include Python.h in every source file that could possible include the headers that reference PyObject*'s, I'm looking for a way to avoid these warnings. I expect there is none, but... Thanks in advance. -tree -- Tom Emerson Basis Technology Corp. Software Architect http://www.basistech.com "Beware the lollipop of mediocrity: lick it once and you suck forever"

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Runtime Error about fileinput.py
by Vivian Wang 13 Aug '03

13 Aug '03

I got this error, what should I do? File "os.py", line 43, in ? prepdata(datapath+subcode+'.g1cp',datapath+subcode+'.out'); File "/usr/programs/python/osbatch/generic/func6.py", line 176, in prepdata for line in fileinput.input(g1cpin): File "/usr/lib/python2.2/fileinput.py", line 94, in input raise RuntimeError, "input() already active" RuntimeError: input() already active in os.py #! /usr/local/bin/python2.2 import string, re, time, fileinput, _mysql, os, posix, sys, ftplib, MySQLdb; execfile( '/usr/programs/python/osbatch/generic/func6.py') in /usr/programs/python/osbatch/generic/func6.py def prepdata(g1cpin,g1cpout): fo = open(g1cpout,'w') for line in fileinput.input(g1cpin): seqno = string.zfill(str(fileinput.filelineno()),8); zip1 = line[0] zip = line[0:5] fo.close() return

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Re: Python Jobs
by Kandidates 13 Aug '03

13 Aug '03

Sorry for posting so many times. When I posted the job yesterday, it came back to me. It said the list was not active and I thought perhaps I should change the email format to plain text and I got the same message. Later on I posted again just to see if it was working and it was not. Today it seems all the jobs got sent to the list and I apologize for any inconvenience this may have caused the list members. On another note, if any Python people are looking for work I would like to get a copy of your resume and rate and/or salary requirement. I want to start marketing Python devs/programmers to the hiring community. I want to assure anyone who is interested that your name/contact information will never be revealed to prospective employers until you say it's ok. Thank you, Beau J. Gould Kandidates.com

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