CentOS 7 python2.7.5 升级到 python 2.7.18 步骤以及问题

[malaohu]

python升级

yum install gcc openssl-devel bzip2-devel 


cd /usr/src
wget https://www.python.org/ftp/python/2.7.18/Python-2.7.18.tgz

tar xzf Python-2.7.18.tgz

cd Python-2.7.18
./configure --enable-optimizations
make altinstall

/usr/local/bin/python2.7 -V

# Python 2.7.18

mv /usr/bin/python /usr/bin/python2.7.5

ln -s /usr/local/bin/python2.7 /usr/bin/python

pip安装

wget https://bootstrap.pypa.io/pip/2.7/get-pip.py
python get-pip.py

各种错误

No module named yum

更新完后，yum 不能用了！！

There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named yum

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.7.18 (default, Jul 20 2021, 22:48:22) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]

If you cannot solve this problem yourself, please go to 
the yum faq at:
  http://yum.baseurl.org/wiki/Faq

修改：/usr/bin/yum

#!/usr/bin/python2.7.5

No module named urlgrabber.grabber

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Traceback (most recent call last):
  File "/usr/libexec/urlgrabber-ext-down", line 22, in <module>
    from urlgrabber.grabber import \
ImportError: No module named urlgrabber.grabber

修改：vi /usr/libexec/urlgrabber-ext-down
同上