[issue444582] Finding programs in PATH, addition to os
Andy Buckley a...@insectnation.org added the comment: Personally I think it's a very useful feature: the purpose for running which may not be to get the full path to the executable and then run it, but rather that that path prefix is important for something else. I'm sure when I joined this issue I had some need like that -- after all, as you say, if you just want to run it then there are better ways. In general, once users have a need (for whatever reason) to start firing off subprocesses from their Python scripts, things can get ugly. Providing a portable path search function provides a way to keep one kind of that ugliness inside Python for the cases where it really is needed. As for abuse... well, people will always find a way to abuse bits of the library: I think that's an issue for them, rather than a reason to block this functionality ;) My $0.02, Andy -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Erik Demaine edema...@mit.edu added the comment: As mentioned in the original request, there are at least two motivations for which functionality that are distinct from running the program (these days, with the subprocess module). #1 was detecting existence of a program. #2 was finding the *second* instance of a program on the path. After 9 years, I'm certainly not holding my breath... -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Éric Araujo mer...@netwok.org added the comment: I apologize for not reading the first post more carefully, thank you for restating the use cases. I’m +1 now and I’ll review the patches to make it up :) Bugs may take years to get fixed. Now that Tarek has expressed interest, be sure that this won’t get lost again. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Éric Araujo mer...@netwok.org added the comment: Is a “which” function that useful, since we have os.exec* functions that search the PATH for us? It seems to me that wanting to know the exact path of an executable is a specialized need, and that adding this function would make beginners use it instead of the os.exec* family. -- nosy: +merwok ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Christophe Simonis simonis.christo...@gmail.com: -- nosy: +Christophe Simonis ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Antoine Pitrou pit...@free.fr: -- assignee: - tarek nosy: +tarek ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Tarek Ziadé ziade.ta...@gmail.com added the comment: SOunds like a good feature to add in shutil, I'll check the patch and also compare it to distutils.spawn.find_executable() -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Tarek Ziadé ziade.ta...@gmail.com added the comment: @iki: could you refactor your code so it's in shutil (and the tests in test_shutil) few remarks: only which/which_files should be public API, Next, I don't think extensions like VBS should be hardcoded if PATHEXT is not found. A pseudo-dos shell just runs .exe and .com IIRC, if not, there's probably somewhere in the win32 environment a list of extensions and their associated programs that get called automatically from the shell (in addition to PATHEXT). We need to find this list programatically rather that harcoding a list that will change from one box to the other. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Dan Buch daniel.b...@gmail.com: -- nosy: +meatballhat ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Jan Killian jan.kill...@gmail.com added the comment: Updated version of reference implementation as a standalone module * changed interface: which_files() returns generator, which() returns first match, or raises IOError(errno.ENOENT) * updated doctest Made this to more closely resemble the 'which' command behavior, and to make the typical use case simpler. The generator interface is still a good idea imho, so it's kept as which_files(). I'm already using the reference implementation module flawlessly, so I don't see any other changes needed on my side. Your ideas are welcome of course. -- Added file: http://bugs.python.org/file16459/which.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Jan Killian jan.kill...@gmail.com added the comment: Adapted Brian Curtin's http://bugs.python.org/file15381/ shutil_which.patch and made another reference implementation as a standalone module including the following fixes: * uses ``PATHEXT`` on Windows * searches current directory before ``PATH`` on Windows, but not before an explicitly passed path * accepts both string or iterable for an explicitly passed path, or pathext * accepts an explicitly passed empty path, or pathext (either '' or []) * does not search ``PATH`` for files that have a path specified in their name already Use any of these changes in the final shutil patch if you like to. The shutil module has availability 'Unix, Windows' after all. -- nosy: +iki Added file: http://bugs.python.org/file16441/which.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Brian Curtin cur...@acm.org: -- stage: test needed - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Brian Curtin cur...@acm.org added the comment: Here is a patch against r76432 which implements a which generator function in shutil that yields full file paths where the searched file exists on the PATH. Includes doc change and a test. It is pretty similar to what edemaine had suggested. This could just as easily return a list, so if that would be more preferable I'll change the patch. -- nosy: +brian.curtin Added file: http://bugs.python.org/file15381/shutil_which.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Andy Buckley a...@insectnation.org: -- nosy: +andybuckley ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Brett Cannon br...@python.org: -- nosy: -brett.cannon ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Daniel Diniz aja...@gmail.com: -- dependencies: +replace dist/src/Tools/scripts/which.py with tmick's which keywords: +easy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Skip Montanaro s...@pobox.com: -- nosy: -skip.montanaro ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Tennessee Leeuwenburg tleeuwenb...@gmail.com added the comment: +1 adding which to shutil -- nosy: +tleeuwenb...@gmail.com ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Changes by Daniel Diniz aja...@gmail.com: -- components: +Library (Lib) -None nosy: +ajaksu2 stage: - test needed versions: +Python 2.7, Python 3.1 -Python 2.6, Python 3.0 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue444582 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue444582] Finding programs in PATH, addition to os
Skip Montanaro added the comment: Commenting on Brett's reply... We use this sort of facility in SpamBayes to search for the OCR program. I crafted something by hand which didn't work on Windows. Mark Hammond had to clean up the mess I made. Having this as a canned function in os would be handy. Have a look at find_program in this file: http://spambayes.svn.sourceforge.net/viewvc/*checkout*/spambayes/trunk/spambayes/spambayes/ImageStripper.py?content-type=text%2Fplain -- nosy: +skip.montanaro Tracker [EMAIL PROTECTED] http://bugs.python.org/issue444582 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
