方法一：
1, Get source code
cd
wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tar.xz
xz -d Python-3.6.1.tar.xz
tar xvf Python-3.6.1.tar
2, Compile and install
sudo mkdir /usr/local/python3
cd Python-3.6.1
sudo ./configure --prefix=/usr/local/python3 --enable-optimizations
update zlib
yum install zlib*
vi
sudo make
sudo make install
3, Replace python 2.x with python 3.x
mv /usr/bin/python /usr/bin/python2.7.5
ln -s /usr/local/python3/bin/python3.6 /usr/bin/python
4, Update yum
sudo vi /usr/bin/yum
update the firstline, make sure it is the right path for python2
5, Verify
python
yum
方法二：
sudo yum install epel-release
sudo yum install python36
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