Poor error message when attempting to pip install --download from git or other VCS.

[slacy]

I just thought I'd try this, and was expecting some kind of reasonable error message:

$ pip install --no-install --download=./sdists/ git+https://github.com/hmarr/django-ses.git
<error message, see below>

$ cat ~/.pip/pip.log

---

/home/slacy/src/teethie/a/env/bin/pip run on Fri Jan 6 10:25:22 2012
Downloading/unpacking git+https://github.com/hmarr/django-ses.git
Cloning https://github.com/hmarr/django-ses.git to /tmp/pip-EiLmaO-export
Found command 'git' at '/usr/bin/git'
Running command /usr/bin/git clone -q https://github.com/hmarr/django-ses.git /tmp/pip-EiLmaO-export
Running command /usr/bin/git checkout-index -a -f --prefix ./sdists/
Exception:
Traceback (most recent call last):
File "/home/slacy/src/teethie/a/env/local/lib/python2.7/site-packages/pip-1.0.2-py2.7.egg/pip/basecommand.py", line 126, in main
self.run(options, args)
File "/home/slacy/src/teethie/a/env/local/lib/python2.7/site-packages/pip-1.0.2-py2.7.egg/pip/commands/install.py", line 235, in run
requirement_set.successfully_downloaded])
TypeError: sequence item 0: expected string, NoneType found

[tonyarkles]

I just got this error too:

Downloading django-keyedcache-1.4-6.tar.gz
Downloading from URL https://pypi.python.org/packages/source/d/django-keyedcache/django-keyedcache-1.4-6.tar.gz#md5=cfb044c368c5b6c3b3d34277a0a2adb4 (from https://pypi.python.org/simple/django-keyedcache/)
Saved ./downloaded-packages/django-keyedcache-1.4-6.tar.gz
Exception:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 126, in main
self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 235, in run
requirement_set.successfully_downloaded])
TypeError: sequence item 0: expected string, NoneType found

And I'm not quite sure what that means or what to do about it...

Edit: Just re-read the title of this issue. Mine is similar, but it's not using git or VCS at all. I reordered the list of packages in the requirement.txt and it looks like it just craps out on the last one in the file, no matter which one it is.

Edit #2: pip install --upgrade pip fixed this for me. pip that comes with Ubuntu 12.04.4 LTS seems to be broken.

[xavfernandez]

As already stated, this is fixed in latest pip version.