After installing python3, use the yum command to report an error?

stay CentOS in , By default , Bring their own python2.7 Version environment , But because of business needs , take python Version upgrade to python3.0 Above version , I found a tutorial on the Internet , Smooth will python3.9 installed , But then there is another problem , Due to the installation of python3 Above version , Lead to yum The command does not work properly . function yum The command will report the following error message ：

[[email protected] vagrant]# yum update zip File "/usr/bin/yum", line 30 except KeyboardInterrupt, e: ^ SyntaxError: invalid syntax

​ Catalog ​

​ ​ One 、 The root cause of the problem ​​

​ ​ Two 、 Solution  ​​

One 、 The root cause of the problem

yum Need to use python2 compile , If you install python3 Above and as the default compiler , You will report this error .

Two 、 Solution  

Mainly modify the first line in the file , By default , The first line of the file is as follows ：

#!/usr/bin/python


1.

1、 edit /usr/bin/yum file

#! /usr/bin/python2


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2、 edit  /usr/libexec/urlgrabber-ext-down

#! /usr/bin/python2


1.