我是SciPy和命令行的新手。所以我按照教程安装了科学python，下面是链接
http://penandpants.com/2013/04/04/install-scientific-python-on-mac-os-x/
是的，我正在使用Mac OS X版本10.8.5 Mountain Lion。我已正确安装了最新的Xcode，命令行和Git。然后我按照教程开始安装python。
事情似乎工作正常，但我确实遇到了负担
$ brew install gfortran
显示以下错误
Error: No available formula for gfortran
GNU Fortran is now provided as part of GCC, and can be installed with:
brew install gcc
因此，我安装了gcc。然后我继续
$ brew install scipy --with-openblas
出现以下错误
error: option --single-version-externally-managed not recognized
READ THIS: https://github.com/Homebrew/homebrew/wiki/troubleshooting
/usr/local/Library/Homebrew/exceptions.rb:182:in `dump': undefined local variable or method `f' for #<BuildError:0x10b76f910> (NameError)
from /usr/local/Library/brew.rb:158
当我按照故障排除建议时，以下显示
aca80164:~ user$ brew update
Already up-to-date.
aca80164:~ user$ brew doctor
请注意，这些警告仅用于帮助Homebrew维护人员 如果提交问题，请进行调试。如果您使用Homebrew的所有内容都是 工作正常：请不要担心，只是忽略它们。谢谢！
Warning: Python is installed at /Library/Frameworks/Python.framework
Homebrew只支持构建系统提供的Python或者 酿造Python。特别是，安装到/ Library的Pythons会干扰 与其他软件安装。
Warning: /usr/local/share/python is not needed in PATH.
Formerly homebrew put Python scripts you installed via `pip` or `pip3`
(or `easy_install`) into that directory above but now it can be removed
from your PATH variable.
Python scripts will now install into /usr/local/bin.
You can delete anything, except 'Extras', from the /usr/local/share/python
(and /usr/local/share/python3) dir and install affected Python packages
anew with `pip install --upgrade`.
Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
python
从我的浅薄知识来看，第一次警告似乎很好，关注我的是第二次和第三次警告，我不知道如何从这里开始。我希望有一些建议。谢谢。