安装pillow出现以下问题：
ValueError: jpeg is required unless explicitly disabled using --disable-jpeg, aborting
----------------------------------------
Cleaning up...
Command /usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/pillow/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-SviNMc-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/pillow
Storing debug log for failure in /root/.pip/pip.log
StackOverflow：
http://stackoverflow.com/questions/34631806/fail-during-installation-of-pillow-python-module-in-linux
解决：
sudo yum install python-devel sudo yum install zlib-devel sudo yum install libjpeg-turbo-devel
