mac系统 下安装pip

pip是常用的Python包管理工具，类似于Java的maven。用python的同学，都离不开pip。 
在新mac中想用home-brew安装pip时，遇到了一些小问题：

bogon:~ wanglei$ brew install pip
Error: No available formula with the name "pip"
Homebrew provides pip via: `brew install python`. However you will then
have two Pythons installed on your Mac, so alternatively you can install
pip via the instructions at:

  https://pip.readthedocs.org/en/stable/installing/#install-pip
 
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由此可见，在home-brew中，pip的安装是跟python一起的。

换种方式：

bogon:~ wanglei$ sudo easy_install pip
Password:
Searching for pip
Reading https://pypi.python.org/simple/pip/
...
 
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稍等片刻，pip就安装完毕。。。出现了以下文字

Installed /Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg

Processing dependencies for pip

Finished processing dependencies for pip

成功安装，然后用pip install 就可以安装相应的python文件了。