[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Marc-Andre Lemburg m...@egenix.com added the comment: Guido pronounced on this on python-dev, so closing the request again. -- status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Marc-Andre Lemburg m...@egenix.com added the comment: Setting up specific environments for each Python version is outside the scope of Python. This is something the user needs to handle using a virtualenv setup, an env-setup shell script or similar approach. -- nosy: +lemburg resolution: - rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
R. David Murray rdmur...@bitdance.com added the comment: I disagree with the closing of this bug on the following grounds: currently, and for the foreseeable future, there will be two python commands on many systems, 'python' and 'python3'. This is unlike the superficially similar situation with different versions of the 2 line. I think this issue should be discussed on python-dev before being closed, and will post a pointer there. -- nosy: +r.david.murray status: closed - open ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Marc-Andre Lemburg m...@egenix.com added the comment: R. David Murray wrote: R. David Murray rdmur...@bitdance.com added the comment: I disagree with the closing of this bug on the following grounds: currently, and for the foreseeable future, there will be two python commands on many systems, 'python' and 'python3'. This is unlike the superficially similar situation with different versions of the 2 line. I think this issue should be discussed on python-dev before being closed, and will post a pointer there. You can easily have python3 implemented as shell script setting up PYTHONPATH to whatever your particular Python installation uses. Python itself does not install as python3, so this is not a configuration supported by Python anyway. Also note that it's easy to write a sitecustomize.py which takes care of whatever platform specific side-by-side installation you want to support with an OS or distribution. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
R. David Murray rdmur...@bitdance.com added the comment: Yes, it does: rdmur...@maestro:~/python/py3kls -l ../ptest/p3/bin total 7328 -rwxr-xr-x 1 rdmurray rdmurray 131 Dec 20 12:22 2to3 -rwxr-xr-x 1 rdmurray rdmurray 119 Dec 20 12:22 idle3 -rwxr-xr-x 1 rdmurray rdmurray 104 Dec 20 12:22 pydoc3 -rwxr-xr-x 2 rdmurray rdmurray 3736249 Jan 13 12:43 python3 lrwxrwxrwx 1 rdmurray rdmurray 16 Jan 13 12:44 python3-config - python3.2-config -rwxr-xr-x 2 rdmurray rdmurray 3736249 Jan 13 12:43 python3.2 -rwxr-xr-x 1 rdmurray rdmurray1421 Jan 13 12:44 python3.2-config That's a straight 'make install' from my svn checkout of the py3k trunk. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Ralf Schmitt sch...@gmail.com added the comment: Marc-Andre Lemburg m...@egenix.com added the comment: You can easily have python3 implemented as shell script setting up PYTHONPATH to whatever your particular Python installation uses. yes, and you need to write a python shell script, which resets that variable in case you're starting a python 2 script from your python3 shell script. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Marc-Andre Lemburg m...@egenix.com added the comment: R. David Murray wrote: R. David Murray rdmur...@bitdance.com added the comment: Yes, it does: rdmur...@maestro:~/python/py3kls -l ../ptest/p3/bin total 7328 -rwxr-xr-x 1 rdmurray rdmurray 131 Dec 20 12:22 2to3 -rwxr-xr-x 1 rdmurray rdmurray 119 Dec 20 12:22 idle3 -rwxr-xr-x 1 rdmurray rdmurray 104 Dec 20 12:22 pydoc3 -rwxr-xr-x 2 rdmurray rdmurray 3736249 Jan 13 12:43 python3 lrwxrwxrwx 1 rdmurray rdmurray 16 Jan 13 12:44 python3-config - python3.2-config -rwxr-xr-x 2 rdmurray rdmurray 3736249 Jan 13 12:43 python3.2 -rwxr-xr-x 1 rdmurray rdmurray1421 Jan 13 12:44 python3.2-config That's a straight 'make install' from my svn checkout of the py3k trunk. Sorry, forgot about that change. The name of the binaries is changed during installation - after running 'make' you get a 'python' binary. I wonder whether anyone has ever tried building Python on AIX. Renaming binaries after linking is a bad idea on AIX, since the linker then sometimes fails to resolve symbols. I'm still -1 on the change. People setting up PYTHONPATH will know what they are doing and also know which Python version they are going to use with the customized setting and after the transition from Python 2 to 3 we'd be stuck with user environment setups using PYTHON3PATH instead of PYTHONPATH, so removing PYTHON3PATH again won't be easily possible. Besides, if you change PYTHONPATH, you'd also have to change PYTHONHOME, PYTHONSTARTUP, and all the other flags to use the 'PYTHON3' prefix. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Changes by Brian Curtin cur...@acm.org: -- stage: - needs patch versions: +Python 3.2 -Python 3.0 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Benjamin Peterson [EMAIL PROTECTED] added the comment: What's the status of this? -- nosy: +benjamin.peterson ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Georg Brandl [EMAIL PROTECTED] added the comment: I even run modules compiled for Python 2.2 successfully on 2.5... -- nosy: +georg.brandl __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Alexander Belopolsky [EMAIL PROTECTED] added the comment:
I have never had a problem of different python versions coexisting on
the same machine, but having 32-bit and 64-bit python coexist is much
harder. Particularly when 32-bit python is compiled on the 64-bit OS
(using -m32 flag). There is a related issue1294959 highlighting this
problem.
See also issue1536339, issue1553166, and issue858809.
Ideally, I would like to see a mechanism that would allow both standard
library and user modules to share machine independent (*.py{,c,o}) files
while having separate locations for 32-bit and 64-bit C modules.
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[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Ralf Schmitt [EMAIL PROTECTED] added the comment: I once even had the need for a PYTHON24PATH or PYTHON25PATH. (And I think this would be the right approach, i.e. even using the minor version number). However, now I am a happy user of virtualenv, and I do not even have to set PYTHONPATH anymore... -- nosy: +schmir __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Ralf Schmitt [EMAIL PROTECTED] added the comment: c modules cannot be used when the minor version number changes. If I remember correctly c modules where the problem for me, when I ran python 2.4 and 2.5 in parallel. __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Changes by Benjamin Peterson [EMAIL PROTECTED]: -- type: - feature request __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Glyph Lefkowitz [EMAIL PROTECTED] added the comment: I don't understand your objection. It sounds like you're objecting, but then suggesting an implementation? The line you suggest might just as easily be present in py3k's default site.py and it would work fine. As I understand it, sites don't need this feature, developers do. Let's say I'm working on a typical system with stock python2 and python3 packages installed. Maybe it's a multi-user system, I don't have control over site.py. Normally what I'd do to manipulate sys.path dynamically between different versions would be to install a sitecustomize.py on my one PYTHONPATH entry that detected the version and reacted appropriately. However, writing a program that is both valid python 2 and python 3 is, as I understand it, both tricky and unsupported. Will this specific case be supported so that developers don't need to have root and modify the system python in order to do 2-3 migrations? __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Alexander Belopolsky [EMAIL PROTECTED] added the comment: I don't understand your objection. It sounds like you're objecting, but then suggesting an implementation? This sounds like a kludge addressing a transient problem. It also feels like a solution catering to developers at the expense of user confusion: 1. Why is there PYTHON3PATH, but not PYTHON2PATH? 2. Is PYTHONPATH effectively PYTHON2PATH or PYTHON1PATH? 3. Will PYTHON3PATH be supported forever or deprecated once 2.8 and 3.2 are close enough to support a large common code base? There are many ways to address multi-python site issues. PYTHONPATH is too indiscriminate for some uses. When more fine-grained differentiation between 3.x and 2.x files is needed, a better approach would be a custom loader in metapath that can look for version specific file extensions. I would suggest to wait until there are enough reports from the field on different solutions in actual use before selecting one to standardize on. [I have to mention that perl 5 uses PERL5PATH, but I am not sure whether it is an argument for or against PYTHON3PATH. Can anyone report on pros and cons of PERL5PATH from actual experience?] __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Glyph Lefkowitz [EMAIL PROTECTED] added the comment: The idea is that PYTHON3PATH will be honored in preference to PYTHONPATH, but PYTHONPATH will still be honored. It's exposed only to people who specifically need it. However, I think it's misleading to call the Python 3 transition a transient problem. If we're lucky, it's going to be a decade of slow progress. If we're not, it will never end. Try, for example, compiling your system C library without gets, and see what happens. (And that's been an issue for more than 10 years!) The biggest way to shorten this problem is to provide tools and idioms for developers to use when porting. Specifically like this feature. As far as version specific file extensions - I'd be very happy with that but Guido has said several times that he doesn't like it. Feel free to discuss that with him, but this change is far less invasive. Users who don't need it will simply never know about it. __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
New submission from Glyph Lefkowitz [EMAIL PROTECTED]: Currently if you have both Python 3 and Python 2 installed, there's no way to indicate that .py files in one area are Python 2 syntax and in another area are Python 3 syntax. Being able to distinguish between these would be nice for heterogeneous deployment environments, but is particularly important for developers who are working on Python 3 conversions. It would be good to have a PYTHON3PATH which, if present, would be honored instead of PYTHONPATH. PYTHONPATH could still be honored if PYTHON3PATH was not present, so this is purely a new feature and shouldn't have much impact on compatibility. -- components: Interpreter Core messages: 63820 nosy: glyph severity: normal status: open title: PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments versions: Python 3.0 __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Changes by Neal Norwitz [EMAIL PROTECTED]: -- assignee: - nnorwitz nosy: +nnorwitz priority: - urgent __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2375] PYTHON3PATH environment variable to supersede PYTHONPATH for multi-Python environments
Alexander Belopolsky [EMAIL PROTECTED] added the comment: -1 Sites that need this functionality can emulate this feature in site.py by adding sys.path[1:1] = os.getenv(PYTHON3PATH, ).split(os.pathsep) in py3k installation. I could not find any discussion beyond the original post at http://mail.python.org/pipermail/python-3000/2008-February/012008.html -- nosy: +belopolsky __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2375 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
