如何使Mac OS使用Homebrew安装的python

Question

我已经在网上搜索了一段时间以解决这个问题，到目前为止，我所做的是

1. 在自制软件中安装了python32

2. 更改了我的.bash_profile并向其中添加了以下行：

导出PATH = / usr / local / bin：/ usr / local / sbin：〜/ bin：$ PATH

但是，当我关闭终端并重新启动时，我键入“哪个python”，它仍然会打印：

/ usr / bin / python

并输入“ python –version”仍然：

Python 2.7.2

我还尝试了以下说明：

brew链接-覆盖python

或尝试通过运行以下指令来删除由homebrew安装的python：

酿造删除python

但以上两条指令均导致此错误：

错误：没有这样的桶：/ usr / local / Cellar / python

谁能帮忙，谢谢

Answer 1

如果要使用Homebrew安装Python 3：

$ brew install python3
==> Downloading http://python.org/ftp/python/3.3.0/Python-3.3.0.tar.bz2
Already downloaded: /Library/Caches/Homebrew/python3-3.3.0.tar.bz2
==> ./configure --prefix=/usr/local/Cellar/python3/3.3.0 --enable-ipv6 --datarootdir=/usr/local/Cell
==> make
==> make install PYTHONAPPSDIR=/usr/local/Cellar/python3/3.3.0
==> make frameworkinstallextras PYTHONAPPSDIR=/usr/local/Cellar/python3/3.3.0/share/python3
==> Downloading https://pypi.python.org/packages/source/d/distribute/distribute-0.6.35.tar.gz
Already downloaded: /Library/Caches/Homebrew/distribute-0.6.35.tar.gz
==> /usr/local/Cellar/python3/3.3.0/bin/python3.3 -s setup.py install --force --verbose --install-li
==> Downloading https://pypi.python.org/packages/source/p/pip/pip-1.3.1.tar.gz
Already downloaded: /Library/Caches/Homebrew/pip-1.3.1.tar.gz
==> /usr/local/Cellar/python3/3.3.0/bin/python3.3 -s setup.py install --force --verbose --install-li
==> Caveats
Homebrew's Python3 framework
  /usr/local/Cellar/python3/3.3.0/Frameworks/Python.framework

Distribute and Pip have been installed. To update them
  pip3 install --upgrade distribute
  pip3 install --upgrade pip

To symlink "Idle 3" and the "Python Launcher 3" to ~/Applications
  `brew linkapps`

You can install Python packages with
  `pip3 install <your_favorite_package>`

They will install into the site-package directory
 /usr/local/lib/python3.3/site-packages
Executable python scripts will be put in:
 /usr/local/share/python3
so you may want to put "/usr/local/share/python3" in your PATH, too.

See: https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python

安装完成后，更新系统PATH变量，将下一行添加到~/.bash_profile

export PATH=/usr/local/bin:/usr/local/sbin:~/bin:$PATH

接着：

$ source ~/.bash_profile

现在启动Python：

$ python3
Python 3.3.0 (default, Mar 26 2013, 10:01:40) 
[GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.27)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

您可以检查python3路径：

$ which python3
/usr/local/bin/python3