1、2.0系统默认就有,因为yum依赖python
2、3.4编译安装,下载Python-3.4.3.tgz
3、编译安装
tar zxf Python-3.4.3.tgz
cd Python-3.4.3
./configure --prefix=/usr/local/python
make
make install
4、创建链接
ln -s /usr/local/python/bin/python3.4 /usr/bin
5、实例
#!/usr/bin/python3.4
import math
help("math")
print (math.pi)