Warning: cannot find svn location for distribute==0.6.16dev-r0

First, I'd note that is not an error, but rather a warning (though it is a serious one).

This appears to be an open issue in pip, judging by this issue page on the github repository. The problem arises when pip is installing something a development version that is held on a repository that is not SVN. One example that issue page provides:

mkvirtualenv test --no-site-packagesworkon testpip install flask==devpip freeze > requirements.txt

It will print this result to standard error:

Warning: cannot find svn location for Flask==0.9-devdev-20120114

But the file will still have:

## FIXME: could not find svn URL in dependency_links for this package:Flask==0.9-devdev-20120114Jinja2==2.6Werkzeug==0.8.2wsgiref==0.1.2

However, I won't be able to use this file in the future to install Flask. See here:

mkvirtualenv test2 --no-site-packagesworkon test2pip install -r requirements.txt

Will output the error:

Downloading/unpacking Flask==0.9-devdev-20120114 (from -r requirements.txt (line 2))Could not find a version that satisfies the requirement Flask==0.9-devdev-20120114 (from -r requirements.txt (line 2)) (from versions: )No distributions matching the version for Flask==0.9-devdev-20120114 (from -r requirements.txt (line 2))Storing complete log in /Users/dgrtwo/.pip/pip.log

sudo pip install --upgrade distribute

Don't have enough rep to comment, but sudo pip install --upgrade distribute borked my pip installation. Pip version 1.4.1. After running that command, pip freeze gives an AssertionError.

The fix for THAT is sudo pip install setuptools==7.0

The two solutions combined fixed the svn URL warning.