报错如下：

copying src/twisted/words/xish/xpathparser.g -> build/lib.linux-x86_64-2.7/twisted/words/xish
running build_ext
building 'twisted.test.raiser' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
creating build/temp.linux-x86_64-2.7/src/twisted
creating build/temp.linux-x86_64-2.7/src/twisted/test
gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -I/usr/include/python2.7 -c src/twisted/test/raiser.c -o build/temp.linux-x86_64-2.7/src/twisted/test/raiser.o
src/twisted/test/raiser.c:4:20: fatal error: Python.h: No such file or directory#include "Python.h"^
compilation terminated.
error: command 'gcc' failed with exit status 1----------------------------------------

Command “/root/.virtualenvs/env1/bin/python2 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-E6hTSG/Twisted/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(‘\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” install –record /tmp/pip-0tSQqb-record/install-record.txt –single-version-externally-managed –compile –install-headers /root/.virtualenvs/env1/include/site/python2.7/Twisted” failed with error code 1 in /tmp/pip-build-E6hTSG/Twisted/

问题原因：没有安装python-devel包
执行yum install python-devel 即可。
注意：1、如果找不到安装包，可以安装epel yum 源头：
yum install epel-release
2、如果目标Python版本是Python3则要安装对应的python3-devel