1.檢視系統資訊

[root@localhost software]# cat /etc/redhat-release 
CentOS release 6.6 (Final)
[root@localhost software]# uname -r
2.6.32-504.el6.x86_64

2.檢視已安裝Python版本

[[email protected] software]# rpm -aq | grep python
python-meh-0.12.1-3.el6.noarch
python-ethtool-0.6-5.el6.x86_64
python-decorator-3.0
 
.1-3.1.el6.noarch
gnome-python2-gconf-2.28.0-3.el6.x86_64
at-spi-python-1.28.1-2.el6.centos.x86_64
python-markupsafe-0.9.2-4.el6.x86_64
gnome-python2-applet-2.28.0-5.el6.x86_64
gnome-python2-libwnck-2.28.0-5.el6.x86_64
python-2.6.6-52.el6.x86_64
libxml2-python-2.7.6-14.el6_5.2.x86_64

3.下載並編譯安裝要升級到的Python版本

下載地址
https://www.python.org/downloads/
./configure
make && make install
4、將系統預設的python版本設定為3.6.2
[[email protected] ~]# rm /usr/bin/python
[[email protected] ~]# ln -s /usr/local/bin/python3.6 /usr/bin/python

五、檢查升級後的python版本

[root@localhost software]# python -V
Python 3.6.2

六.解決升級後yum源不能使用問題

#vim /usr/bin/yum

將#/usr/bin/python改為/usr/bin/python2.6儲存後，執行
yum update

#yum update