Mountain Lionにしたんでpythonを入れなおした

いまさら1700円払ってMountain lionにしたので、pythonを入れなおした。

brewでpyhtonを入れる

$ brew install python

~~省略~~

Python demo
  /usr/local/share/python/Extras

Distribute and Pip have been installed. To update them
  pip install --upgrade distribute
  pip install --upgrade pip

To symlink "Idle" and the "Python Launcher" to ~/Applications
  `brew linkapps`

You can install Python packages with (the outdated easy_install or)
  `pip install <your_favorite_package>`

They will install into the site-package directory
  /usr/local/lib/python2.7/site-packages

See: https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python
Warning: Could not link python. Unlinking...
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
You can try again using `brew link python'

==> Summary
 /usr/local/Cellar/python/2.7.5: 5200 files, 80M, built in 5.4 minutes

brew link python

$  brew link python
Linking /usr/local/Cellar/python/2.7.5... Warning: Could not link python. Unlinking...

Error: Could not symlink file: /usr/local/Cellar/python/2.7.5/bin/smtpd2.7.py
Target /usr/local/bin/smtpd2.7.py already exists. You may need to delete it.
To force the link and overwrite all other conflicting files, do:
  brew link --overwrite formula_name

To list all files that would be deleted:
  brew link --overwrite --dry-run formula_name

$  brew link --overwrite --dry-run python
Would remove:
/usr/local/bin/smtpd2.7.py
/usr/local/bin/smtpd.py
/usr/local/bin/pythonw2.7
/usr/local/bin/pythonw
/usr/local/bin/python2.7-config
/usr/local/bin/python2.7
/usr/local/bin/python-config
/usr/local/bin/python
/usr/local/bin/pydoc2.7
/usr/local/bin/pydoc
/usr/local/bin/pip-2.7
/usr/local/bin/pip
/usr/local/bin/idle2.7
/usr/local/bin/idle
/usr/local/bin/easy_install-2.7
/usr/local/bin/easy_install
/usr/local/bin/2to3-2.7
/usr/local/bin/2to3

$ brew link --overwrite  python
Linking /usr/local/Cellar/python/2.7.5... 30 symlinks created

distributeのアップグレード

$ sudo pip install --upgrade distribute
Password:
Requirement already up-to-date: distribute in /usr/local/Cellar/git/1.7.9/lib/python2.7/site-packages
Downloading/unpacking setuptools>=0.7 (from distribute)
  Downloading setuptools-0.8.tar.gz (756kB): 756kB downloaded
  Running setup.py egg_info for package setuptools

Installing collected packages: setuptools
  Found existing installation: setuptools 0.6c11
    Uninstalling setuptools:
      Successfully uninstalled setuptools
  Running setup.py install for setuptools

    Installing easy_install script to /usr/local/bin
    Installing easy_install-2.7 script to /usr/local/bin
Successfully installed setuptools
Cleaning up...

pipのアップグレード

$ sudo pip install --upgrade pip
Requirement already up-to-date: pip in /usr/local/Cellar/git/1.7.9/lib/python2.7/site-packages/pip-1.3.1-py2.7.egg
Cleaning up...

virtualenvのインストール

$ sudo pip install virtualenv
$ sudo pip install virtualenvwrapper
$ mkdir ~/.virtualenvs

virtualenvの設定

export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--no-site-packages'
export PIP_VIRTUALENV_BASE=$WORKON_HOME
export PIP_RESPECT_VIRTUALENV=true

source /usr/local/bin/virtualenvwrapper.sh

mkvirtualenvでエラー

$  mkvirtualenv
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
    working_set.require(__requires__)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: virtualenv==1.8.2

バージョン指定してインストールし直し

$  sudo pip install virtualenv==1.8.2

これでmkvirtualenvできるようになった