安装mysql-devel时报错【File "/usr/bin/yum", line 30 except KeyboardInterrupt, e:】

安装mysql-devel时报错，由于yum包管理是使用python2.x写的，到python3.1后，语法兼容性导致问题出现 

[root@VM_0_15_centos ~]# yum install mysql-devel
  File "/usr/bin/yum", line 30
    except KeyboardInterrupt, e:
                            ^
SyntaxError: invalid syntax

解决方法： 
修改yum配置文件，将python版本指向以前的旧版本

查看旧版本：

[root@VM_0_15_centos bin]# cd /usr/bin
[root@VM_0_15_centos bin]# ll pyth*
lrwxrwxrwx  1 root root   24 Dec 29 16:21 python -> /usr/local/bin/python3.7
lrwxrwxrwx. 1 root root    9 Jan  9  2018 python2 -> python2.7
-rwxr-xr-x. 1 root root 7136 Aug  4  2017 python2.7
[root@VM_0_15_centos bin]# 

 

vi /usr/bin/yum

#!/usr/bin/python2.7

[root@VM_0_15_centos bin]# vi /usr/bin/yum

#!/usr/bin/python2.7
import sys
try:
    import yum
except ImportError:
    print >