删除重复的Python安装后，Python会在mac上请求较旧的路径

Question

在通过brew install python干净安装python后，出现以下错误。该链接属于我手动删除的前一个python安装。

$ virtualenv ENV
python: posix_spawn: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python: No such file or directory

我使用MacOS 10.7.3，并通过pip安装了virtualenv：

$ sudo /usr/local/share/python/pip install virtualenv
 Downloading/unpacking virtualenv
 Downloading virtualenv-1.7.1.2.tar.gz (2.1Mb): 2.1Mb downloaded
 Running setup.py egg_info for package virtualenv

 warning: no previously-included files matching '*.*' found under directory 'docs/_templates'
 Installing collected packages: virtualenv
 Running setup.py install for virtualenv

 warning: no previously-included files matching '*.*' found under directory 'docs/_templates'
 Installing virtualenv script to /usr/local/share/python
 Successfully installed virtualenv
 Cleaning up...
$ virtualenv ENV
 python: posix_spawn: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python: No such file or directory

我该怎么解决？

编辑：我重新安装了MacOSx，现在返回到以前的状态，这使我删除了预先安装的python。

$ which python 
/Library/Frameworks/Python.framework/Versions/2.7/bin/python 
$ which pip /usr/local/bin/pip $ sudo pip install virtualenv
Downloading/unpacking virtualenv 
Downloading virtualenv-1.7.1.2.tar.gz (2.1Mb): 2.1Mb downloaded
Running setup.py egg_info for package virtualenv

warning: no previously-included files matching '*.*' found under directory 'docs/_templates'
Installing collected packages: virtualenv
Running setup.py install for virtualenv

warning: no previously-included files matching '*.*' found under directory 'docs/_templates'
Installing virtualenv script to /usr/local/bin
Successfully installed virtualenv
Cleaning up...


$ python virtualenv.py ENV
/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/‌​MacOS/Python: can't open file 'virtualenv.py': [Errno 2] No such file or directory

virtualenv.py位于/Library/Python/2.7/site-packages/virtualenv.py和/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/Python/py2app/recipes/virtualenv.py，但Python却忽略了所有这些。

为什么这么乱？我该如何着手解决这个问题？

Answer 1

我做了删除整个/System/Library/Frameworks/Python.framework/的蠢事之后，也遇到了同样的情况 导致错误的原因：

python: posix_spawn: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python: No such file or directory

我成功地恢复了它，因为我有一个整个磁盘的早期副本，只需复制粘贴整个Python.framework目录。

我不知道它在多大程度上依赖于系统，但是如果有人想尝试用同样的方法而不是重新安装整个OSX，那么从我这里压缩的整个Python.framework就在这里：http://andilabs.com/Python.framework.zip