“pip list” error 124 - Installing on Mac OS x

Question

I'm trying to install pip. I'm running into a problem and I'm not sure how to get around it.

I have activated my virtualenv.

When I run $ pip I get the list of commands, but when I run $ pip list I get the following response.

distribute (0.6.28)
pip (1.4.1)
Exception:
Traceback (most recent call last):
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-packages/pip/basecommand.py", line 134, in main
    status = self.run(options, args)
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-    packages/pip/commands/list.py", line 80, in run
    self.run_listing(options)
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-    packages/pip/commands/list.py", line 127, in run_listing
    self.output_package_listing(installed_packages)
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-packages/pip/commands/list.py", line 136, in output_package_listing
    if dist_is_editable(dist):
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-packages/pip/util.py", line 347, in dist_is_editable
    req = FrozenRequirement.from_dist(dist, [])
  File "/Users/Marcus/Documents/Django/venv/lib/python2.7/site-packages/pip/__init__.py", line 194, in from_dist
    assert len(specs) == 1 and specs[0][0] == '=='
AssertionError

Storing complete log in /Users/Marcus/.pip/pip.log

THanks

Answer 1

Try the solution suggested here on GitHub :

It happens when you install distribute using http://python-distribute.org/distribute_setup.py script. Running pip install -U distribute fixes the problem. The bug reproduces only in pip==1.4.