selfsimilar selfsimilar - 6 months ago 51
Python Question

How can I fix my virtualenv?

I just upgraded to OS X Mountain Lion and it killed most of my Python environment. I've reinstalled distribute 0.6.28 (

python distribute_setup.py install --prefix ~/Library/Python/2.7/site-packages
) & pip 1.1 (
python setup.py install --prefix ~/Library/Python/2.7/site-packages
) from scratch. Then I installed
virtualenv
and
virtualenvwerapper
via
pip
without error, but the command
virtualenv ENVTEST
is failing as follows:

$ virtualenv ENVTEST
New python executable in TESTENV/bin/python
Please make sure you remove any previous custom paths from your /Users/x/.pydistutils.cfg file.
Installing setuptools.................done.
Installing pip....
Complete output from command /Users/csh401/TESTENV/bin/python /Users/x/TESTENV/bin/easy_install /Users/x/Librar...ort/pip-1.0.2.tar.gz:
/Users/x/TESTENV/bin/python: can't open file '/Users/x/TESTENV/bin/easy_install': [Errno 2] No such file or directory
----------------------------------------
...Installing pip...done.
Traceback (most recent call last):
File "/Users/x/bin/virtualenv", line 9, in <module>
load_entry_point('virtualenv==1.7.2', 'console_scripts', 'virtualenv')()
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 942, in main
never_download=options.never_download)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 1054, in create_environment
install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 654, in install_pip
filter_stdout=_filter_setup)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 1020, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command /Users/x/.virtualenvs/env1/bin/python -x /Users/x/.virtu...nv1/bin/easy_install /Users/x/Librar...pport/pip-1.1.tar.gz failed with error code 2


My best guess is that it has to do with the fact that I was having trouble installing
distribute
and
pip
until I added the
--prefix
argument. But now while pip is working, it's not installing to the right location.

UPDATE

pip installed an older version of virtualenv. I ran
pip install -U virtualenv
and this ran without a hitch. Still getting an error, but a different error, now.

$ virtualenv -vvv TESTENV
Creating TESTENV/lib/python2.7
Symlinking Python bootstrap modules
Symlinking TESTENV/lib/python2.7/config
Symlinking TESTENV/lib/python2.7/lib-dynload
Symlinking TESTENV/lib/python2.7/os.py
Ignoring built-in bootstrap module: posix
Symlinking TESTENV/lib/python2.7/posixpath.py
Cannot import bootstrap module: nt
Symlinking TESTENV/lib/python2.7/ntpath.py
Symlinking TESTENV/lib/python2.7/genericpath.py
Symlinking TESTENV/lib/python2.7/fnmatch.py
Symlinking TESTENV/lib/python2.7/locale.py
Symlinking TESTENV/lib/python2.7/encodings
Symlinking TESTENV/lib/python2.7/codecs.py
Symlinking TESTENV/lib/python2.7/stat.py
Symlinking TESTENV/lib/python2.7/UserDict.py
File TESTENV/lib/python2.7/lib-dynload/readline.so already exists
Symlinking TESTENV/lib/python2.7/copy_reg.py
Symlinking TESTENV/lib/python2.7/types.py
Symlinking TESTENV/lib/python2.7/re.py
Symlinking TESTENV/lib/python2.7/sre.py
Symlinking TESTENV/lib/python2.7/sre_parse.py
Symlinking TESTENV/lib/python2.7/sre_constants.py
Symlinking TESTENV/lib/python2.7/sre_compile.py
File TESTENV/lib/python2.7/lib-dynload/zlib.so already exists
Symlinking TESTENV/lib/python2.7/warnings.py
Symlinking TESTENV/lib/python2.7/linecache.py
Symlinking TESTENV/lib/python2.7/_abcoll.py
Symlinking TESTENV/lib/python2.7/abc.py
Symlinking TESTENV/lib/python2.7/_weakrefset.py
Creating TESTENV/lib/python2.7/site-packages
Writing TESTENV/lib/python2.7/site.py
Writing TESTENV/lib/python2.7/orig-prefix.txt
Writing TESTENV/lib/python2.7/no-global-site-packages.txt
Creating parent directories for TESTENV/include
Symlinking TESTENV/include/python2.7
Creating TESTENV/bin
New python executable in TESTENV/bin/python
Changed mode of TESTENV/bin/python to 0755
MacOSX Python framework detected
Symlinking TESTENV/.Python
Testing executable with TESTENV/bin/python -c "import sys;out=sys.stdout;getattr(out, "buffer", out).write(sys.prefix.encode("utf-8"))"
Got sys.prefix result: u'/Users/x/TESTENV'
Please make sure you remove any previous custom paths from your /Users/x/.pydistutils.cfg file.
Creating TESTENV/lib/python2.7/distutils
Writing TESTENV/lib/python2.7/distutils/__init__.py
Writing TESTENV/lib/python2.7/distutils/distutils.cfg
Using existing distribute egg: /Users/x/Library/Python/2.7/site-packages/virtualenv_support/distribute-0.6.27.tar.gz
Installing distribute...
Running command /Users/x/TESTENV/bin/python -c "#!python
\"\"\"Bootstra... main(sys.argv[1:])
" -v --always-copy -U distribute
Extracting in /var/folders/97/bds2slvx25s53xx1b_strvfs4xdq4b/T/tmpbqvjfq
Now working in /var/folders/97/bds2slvx25s53xx1b_strvfs4xdq4b/T/tmpbqvjfq/distribute-0.6.27
Installing Distribute
running install
Checking .pth file support in /Users/x/Library/Python/2.7/site-packages/
/Users/x/TESTENV/bin/python -E -c pass
TEST FAILED: /Users/x/Library/Python/2.7/site-packages/ does NOT support .pth files
error: bad install directory or PYTHONPATH

You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from. The
installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

/Users/x/Library/Python/2.7/site-packages/

and your PYTHONPATH environment variable currently contains:

''

Here are some of your options for correcting the problem:

* You can choose a different installation directory, i.e., one that is
on PYTHONPATH or supports .pth files

* You can add the installation directory to the PYTHONPATH environment
variable. (It must then also be on PYTHONPATH whenever you run
Python and want to use the package(s) you are installing.)

* You can set up the installation directory to support ".pth" files by
using one of the approaches described here:

http://packages.python.org/distribute/easy_install.html#custom-installation-locations

Please make the appropriate changes for your system and try again.
Something went wrong during the installation.
See the error message above.
...Installing distribute...done.
Installing existing pip-1.1.tar.gz distribution: /Users/x/Library/Python/2.7/site-packages/virtualenv_support/pip-1.1.tar.gz
Installing pip...
Running command /Users/x/TESTENV/bin/python -x /Users/x/TESTENV/bin/easy_install /Users/x/Librar...pport/pip-1.1.tar.gz
/Users/x/TESTENV/bin/python: can't open file '/Users/x/TESTENV/bin/easy_install': [Errno 2] No such file or directory
Complete output from command /Users/x/TESTENV/bin/python -x /Users/x/TESTENV/bin/easy_install /Users/x/Librar...pport/pip-1.1.tar.gz:
/Users/x/TESTENV/bin/python: can't open file '/Users/x/TESTENV/bin/easy_install': [Errno 2] No such file or directory
----------------------------------------
...Installing pip...done.
Traceback (most recent call last):
File "/Users/x/bin/virtualenv", line 9, in <module>
load_entry_point('virtualenv==1.7.2', 'console_scripts', 'virtualenv')()
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 942, in main
never_download=options.never_download)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 1054, in create_environment
install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 654, in install_pip
filter_stdout=_filter_setup)
File "/Users/x/Library/Python/2.7/site-packages/virtualenv.py", line 1020, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command /Users/x/TESTENV/bin/python -x /Users/x/TESTENV/bin/easy_install /Users/x/Librar...pport/pip-1.1.tar.gz failed with error code 2


So it looks like my PYTHONPATH is somehow blanked out in the environment virtualenv is trying to build. That should be easy to fix, right?

Answer

It's a problem with distutils. I deleted $HOME/.pydistutils.cfg and ran sudo setup.py install to get distribute in the right place, then sudo setup virtualenv which placed it into the appropriate site-packages directory for the MacPorts version of Python 2.7. Now I can run virtualenv TestEnv without any problems.