安装matplotlib需要很多依赖包，有个捷径自动安装。
1.yum search matplotlib
返回结果是：
[root@dn1 Desktop]# yum search matplotlib
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=========================== N/S matched: matplotlib ============================
python-matplotlib-doc.x86_64 : Documentation files for python-matplotlib
python-matplotlib-qt4.x86_64 : Qt4 backend for python-matplotlib
python-matplotlib-tk.x86_64 : Tk backend for python-matplotlib
python-matplotlib.x86_64 : Python 2D plotting library
2. 选择最下方的那个，安装。需要root权限的话，添加
sudo yum install python-matplotlib.x86_64
它会把一切依赖给你装上。
