Using Virtualenv with Python 3

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#1

Hello,

I just installed openSUSE 12.3 and was trying to setup a Python development environment, so I installed the following packages:

python3, python3-devel, python3-pip

.

Then I used pip to install virtualenv:

sudo pip-3.3 install virtualenv

When I now try to create a virtualenv via

virtualenv-3.3 ~/virtualenvs/venv01

I get the following error message:


Installing distribute.........................................................................................................................................................................................................................................................................................................................................................................................................done.
Installing pip....
  Complete output from command /home/name/virtualenvs/venv01/bin/python3 -x /home/name/virtua...v01/bin/easy_install /usr/local/lib/pytho...ort/pip-1.3.1.tar.gz:
  /home/name/virtualenvs/venv01/bin/python3: can't open file '/home/name/virtualenvs/venv01/bin/easy_install': [Errno 2] No such file or directory
----------------------------------------
...Installing pip...done.
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 9, in <module>
    load_entry_point('virtualenv==1.9.1', 'console_scripts', 'virtualenv')()
  File "/usr/local/lib/python3.3/site-packages/virtualenv.py", line 979, in main
    no_pip=options.no_pip)
  File "/usr/local/lib/python3.3/site-packages/virtualenv.py", line 1094, in create_environment
    install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
  File "/usr/local/lib/python3.3/site-packages/virtualenv.py", line 667, in install_pip
    filter_stdout=_filter_setup)
  File "/usr/local/lib/python3.3/site-packages/virtualenv.py", line 1057, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /home/name/virtualenvs/venv01/bin/python3 -x /home/name/virtua...v01/bin/easy_install /usr/local/lib/pytho...ort/pip-1.3.1.tar.gz failed with error code 2

This seem to a problem due to the fact that openSUSE sets a default distutils prefix (https://en.opensuse.org/openSUSE:Packaging_Python#File_locations).

Due to this prefix distribute is not installed into the directories venv01/lib/python3.3/site-packages and venv01/bin but instead into the directories venv01/local/lib/python3.3/site-packages and venv01/local/bin.

Is there an easy way to fix this and make virtualenv work in openSUSE?

This is a really essential tool for my Python development and I would sorely miss it :(.

Thanks in advance for any help.

#2

i have the same problem. don’t have a solution yet, but thanks for posting - good to know i am not alone!

#3

https://bugzilla.novell.com/show_bug.cgi?id=809831

#4

kind-of obvious, but you can work-around this by installing everything yourself (starting with Python 3.3).

instructions at Andrew Cooke: C[omp]ute

#5

Thanks Andrew, that’s probably the easiest solution.

I attempted messing with local pydistutils.cfg files, but could not really get it working.

So will simply reinstall my own python according to your instructions.

#6

hello folks, thanks for discovering the problem.

i pushed a fixed package into devel:languages:python:Factory OBS repository, so as soon as the rebuild finishes you can install python3 from there. (that might be a good idea anyway, if you don’t want to wait for official updates)

alternately, for a workaround on existing installations that doesn’t involve rebuilding the whole of python, download this:
http://users.suse.cz/~jmatejek/fix-virtualenv.patch
and use it, as root, like this - assuming you are on a 64bit system and that you downloaded the file to your home directory:

# cd /usr/lib64/python
# patch -p1 < ~/fix-virtualenv.patch
#7

Hi matejcik,

Awesome that you actually could fix this bug!

However it seems that the website you hosted the patch on is down.
Would you care to upload it again? I would really like to take a look where the problem actually came from.

Thanks again for your awesome work :).

Cheers,

Gjallar

#8

ah, sorry about that. apparently that URL is internal only.
this one should work right: http://paste.opensuse.org/view/download/bf0feecd
(except it apparently doesn’t give you the right filename, as it’s from a pastebin: http://paste.opensuse.org/bf0feecd
oh well, i’m sure you can work with that too ;e) )