pip listのAssertionError

メモから再開する逆襲のエンジニアブログ

久しぶりにOSXでpython環境を作成したところ、
いきなりpip listでAssertionError

追記 2013-10-06 Debian 7.1でも同様のAssertionErrorを確認

$ pip list
distribute (0.6.49)
pip (1.4.1)
Exception:
Traceback (most recent call last):
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/basecommand.py", line 134, in main
    status = self.run(options, args)
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/commands/list.py", line 80, in run
    self.run_listing(options)
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/commands/list.py", line 127, in run_listing
    self.output_package_listing(installed_packages)
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/commands/list.py", line 136, in output_package_listing
    if dist_is_editable(dist):
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/util.py", line 347, in dist_is_editable
    req = FrozenRequirement.from_dist(dist, [])
  File "/Users/foo/.pythonz/pythons/CPython-3.3.2/lib/python3.3/site-packages/pip-1.4.1-py3.3.egg/pip/__init__.py", line 194, in from_dist
    assert len(specs) == 1 and specs[0][0] == '=='
AssertionError

もうstackoverflowなしじゃ生きていけない・・・
http://stackoverflow.com/questions/18542633/pip-list-error-124-installing-on-mac-os-x

というわけで、distributeをアップデートして対策完了

$ pip install -U distribute

$ pip list
distribute (0.7.3)
pip (1.4.1)
setuptools (0.6c11)
stevedore (0.12)
virtualenv (1.10.1)
virtualenv-clone (0.2.4)
virtualenvwrapper (4.1.1)