DistributionNotFoundエラーの対処方法

問題

pipのバージョンが古いため、正常に動作しなかった。

環境

OSX 10.9.2

トラブル

コマンド

$ python --version

実行結果

Traceback (most recent call last):
  File "/usr/local/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/Library/Python/2.7/site-packages/distribute-0.6.49-py2.7.egg/pkg_resources.py", line 2877, in <module>
    working_set.require(__requires__)
  File "/Library/Python/2.7/site-packages/distribute-0.6.49-py2.7.egg/pkg_resources.py", line 698, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/Library/Python/2.7/site-packages/distribute-0.6.49-py2.7.egg/pkg_resources.py", line 596, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: pip==1.4.1

対応方法

pipをupgradeすることによって解決した。

コマンド

$ sudo easy_install --upgrade pip

実行結果

Reading http://pypi.python.org/simple/pip/
Best match: pip 1.5.4
Downloading https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb
Processing pip-1.5.4.tar.gz
Writing /tmp/easy_install-w8dJ21/pip-1.5.4/setup.cfg
Running pip-1.5.4/setup.py -q bdist_egg --dist-dir /tmp/easy_install-w8dJ21/pip-1.5.4/egg-dist-tmp-61WflU
warning: no files found matching 'pip/cacert.pem'
warning: no files found matching '*.html' under directory 'docs'
warning: no previously-included files matching '*.rst' found under directory 'docs/_build'
no previously-included directories found matching 'docs/_build/_sources'
Adding pip 1.5.4 to easy-install.pth file
Installing pip script to /usr/local/bin
Installing pip2.7 script to /usr/local/bin
Installing pip2 script to /usr/local/bin

Installed /Library/Python/2.7/site-packages/pip-1.5.4-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip

確認

正常に動作するようになったことを確認した。

コマンド

$ python --version

実行結果

pip 1.5.4 from /Library/Python/2.7/site-packages/pip-1.5.4-py2.7.egg (python 2.7)