由于从版本2.7.13_1开始对python2的Homebrew公式进行了最新更改，因此Homebrew不再为python创建到Homebrew版本的符号链接.

Due to a recent change in the Homebrew formula for python2 starting with version 2.7.13_1, Homebrew no longer creates a symlink for python to the Homebrew version.

相反，它仅安装和符号链接python2.您需要采取其他步骤才能使用它，而不是Python的系统版本.

Instead, it only installs and symlinks python2. You will need to take an additional step to use it instead of the system version of Python.

请参阅此软件包信息中的注意事项"部分.下面是一个示例，但请注意，实际导出的PATH已生成，并且在您的计算机上可能有所不同.

See the "Caveats" section in this package's info. Below is an example, but note that the actual PATH to export is generated and may be different on your machine.

$ brew info python2

... snip ...

=> Caveats
This formula installs a python2 executable to /usr/local/bin.
If you wish to have this formula's python executable in your PATH then add
the following to ~/.bash_profile:
  export PATH="<... some path ...>:$PATH"

... snip ...

Homebrew在其

Homebrew talked more about this change in their recent release notes.