(请确保xcode command line tools已经安装)

直接使用 =pip install= 会出现 =event.h= 找不到：

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   clang: warning: argument unused during compilation: '-mno-fused-madd'
    In file included from gevent/core.c:253:
    gevent/libevent.h:9:10: fatal error: 'event.h' file not found
    #include "event.h"
             ^
    1 error generated.
    error: command 'clang' failed with exit status 1

这个时候需要安装 =libevent=:

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brew install libevent

然后安装 =gevent=

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sudo pip install gevent

安装成功之后，测试一下发现会出错：

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>>> import gevent
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/gevent/__init__.py", line 40, in <module>
ImportError: cannot import name core

原来是因为没有安装 =cython=, 安装之

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sudo pip install cython

并重新安装 =greenlet= 和 =gevent=

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sudo pip uninstall gevent
sudo pip uninstall greenlet
sudo pip install greenlet
sudo pip install gevent