在OSX上使用easy_install或setup.py安装Python模块

Question

我正在使用Snow Leopard 10.6系统，想要安装以下几个Python模块：

numpy
scipy
matplotlib

我遇到了一些问题，因为OSX里有两个版本的Python：

/Library/Python/
/System/Library/Frameworks/Python.framework/

当我执行以下命令时：

sudo easy_install -U {module}，模块似乎被安装到了这个目录：

bash-3.2$ ls -al /Library/Python/2.6/site-packages/
total 688
drwxrwxr-x  12 root  admin     408 Aug 24 23:26 .
drwxrwxr-x   3 root  admin     102 Feb 11  2010 ..
-rw-rw-r--   1 root  admin     119 Feb 11  2010 README
-rw-r--r--   1 root  admin     267 Aug 24 19:03 easy-install.pth
drwxr-xr-x   5 root  admin     170 Aug 24 10:42 nose-0.11.4-py2.6.egg
drwxr-xr-x  38 root  admin    1292 Aug 24 15:35 numpy
-rw-r--r--   1 root  admin    1618 Aug 24 15:35 numpy-2.0.0.dev8661-py2.6.egg-info
drwxr-xr-x  16 root  admin     544 Aug 24 19:07 numscons
drwxr-xr-x   4 root  admin     136 Aug 24 19:03 numscons-0.10.1-py2.6.egg
-rw-r--r--   1 root  admin     265 Aug 24 19:07 numscons-0.12.0dev-py2.6.egg-info
-rw-r--r--   1 root  admin  333959 Aug 23 11:51 setuptools-0.6c11-py2.6.egg
-rw-r--r--   1 root  admin      30 Aug 23 11:51 setuptools.pth

但是，当我尝试安装scipy时，出现了以下错误：

    config = setup_module.configuration(*args)
  File "scipy/setup.py", line 20, in configuration
    config.add_subpackage('special')
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/numpy/distutils/misc_util.py", line 851, in add_subpackage
    caller_level = 2)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/numpy/distutils/misc_util.py", line 834, in get_subpackage
    caller_level = caller_level + 1)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/numpy/distutils/misc_util.py", line 766, in _get_configuration_from_setup_py
    ('.py', 'U', 1))
  File "scipy/special/setup.py", line 14, in <module>
    (numpy.__version__, numpy.__file__))
ValueError: numpy >= 1.4 is required (detected 1.2.1 from /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/numpy/__init__.pyc)

看起来它在我的框架目录中寻找一个旧版本的numpy。我用import命令查看Python找到的numpy版本：

 python -c 'import numpy;print numpy.__version__'
1.2.1

果然，它在框架目录中查找，尽管我在这里有一个新版本：

/Library/Python/2.6/site-packages/

我知道import命令会先在本地目录查找，然后再去PYTHONPATH，最后才看sys.path。所以我检查了一下这些，发现我现在没有设置PYTHONPATH，这里是我的sys.path：

/Library/Python/2.6/site-packages/setuptools-0.6c11-py2.6.egg
/Library/Python/2.6/site-packages/nose-0.11.4-py2.6.egg
/Library/Python/2.6/site-packages/numscons-0.10.1-py2.6.egg
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python26.zip
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-darwin
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac/lib-scriptpackages
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-old
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload
/Library/Python/2.6/site-packages
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/PyObjC
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/wx-2.8-mac-unicode

如果我把PYTHONPATH改成/Library/Python/2.6/site-packages，然后检查numpy的版本，我就能得到正确的版本：

bash-3.2$ python -c 'import numpy; print numpy.__version__'
2.0.0.dev8661

但是当我运行sudo python setup.py build/install时，scipy还是找不到正确的numpy，尽管PYTHONPATH已经设置了。

有没有人能帮我解决这个问题？

我找到一个链接，看起来可以解决我的问题，但我似乎无法让它工作：

http://andreasjacobsen.com/2008/10/10/using-python-setuptools-on-the-mac/

osx numpy scipy setup.py matplotlib sys.path easy_install Python模块

在OSX上使用easy_install或setup.py安装Python模块

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