安装python3.6可能使用相关软件
# yum groupinstall 'Development Tools'# yum install -y ncurses-libs zlib-devel mysql-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel安装python3.6.5
python官网下载https://www.python.org
下载的安装包存放在/usr/local目录
# cd /usr/local# wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz解压：
# tar -xf Python-3.6.5.tar.xz解压后新建文件夹将Python-3.6.5放在/usr/local/python3下
进入该目录····························一定要进去的哈，不然安装会出错
# mkdir python3
# mv Python-3.6.5 python3
# cd python3/Python-3.6.5执行如下代码安装
···························--prefix选项是配置安装的路径,执行后所有资源文件放在/usr/local/python3.6的路径中
# ./configure --prefix=/usr/local/python3 --enable-optimizations
# make
# make altinstall
修改软链接：
修改之前一定要对以存在的/usr/bin/python更名，否则出现如下错误
ln: failed to create symbolic link ‘/usr/bin/python’: File exists
可修改为：
# mv python python_old
························当然任意名字都可
终于可以修改软链接了
# ln -s /usr/local/python3/bin/python3 /usr/bin/python
# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip
最后修改yum/gnome-tweak-tool/urlgrabber配置文件，否则之后使用yum可能报错
[root@VM_0_8_centos bin]# ls -ol yum*
-rwxr-xr-x 1 root 802 May 24 23:05 yum
-rwxr-xr-x 1 root 9430 May 24 23:06 yum-builddep
-rwxr-xr-x 1 root 9040 May 24 23:05 yum-config-manager
-rwxr-xr-x 1 root 7610 May 24 23:06 yum-debug-dump
-rwxr-xr-x 1 root 7904 May 24 23:07 yum-debug-restore
-rwxr-xr-x. 1 root 10999 Aug 11 2017 yumdownloader
-rwxr-xr-x 1 root 11032 May 24 23:07 yum-groups-manager
以上文件都要修改文件行首处 #!/usr/bin/python
改为 #!/usr/bin/python2
输入：
# vim yum-builddep
[root@VM_0_8_centos bin]# vim yum-builddep
#!/usr/bin/python -tt !!!!!!!!!!!!!!!!!!就是改这里 加个2 ·················哈哈
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
····························省略一万字
gnome-tweak-tool/urlgrabber配置文件修改同上 ·········gnome-tweak-tool可能无须配置
最后查看安装版本：
# python -V
# pip -V