由于学业需要，开始接触linux，选择了centos6.5。
1.机器学习中，我用Python，学习了如何进行数据处理，期间，需要使用matplotlib进行绘图处理，结果：
#pip install matplotlib显示：
Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_root/matplotlib
Storing debug log for failure in /root/.pip/pip.log
2.又安装pandas
#pip install pandas，显示：
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/matplotlib/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-ModyBS-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/matplotlib
Traceback (most recent call last):
File "/usr/bin/pip", line 11, in <module>
sys.exit(main())
File "/usr/local/python27/lib/python2.7/site-packages/pip/__init__.py", line 185, in main
return command.main(cmd_args)
File "/usr/local/python27/lib/python2.7/site-packages/pip/basecommand.py", line 161, in main
text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 105: ordinal not in range(128)
3.网上搜索，说和python版本有关，因为centos6.5自带python2.6，我自己下载编译了python2.7，并且用python2.7编译安装了pip1.5,所以我才matplotlib默认需要python2.6来编译的缘故。
4.于是有搜到可以yum安装，
# yum install python-matplotlib -y
结果可以用,并且使用python2.6可以import matplotlib
而用自己装的2.7却找不到。