python源:https://www.python.org/ftp/python/
更新至其余版本替换源路径及相应文件版本即可
752 wget https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz
753 pwd
754 ls
755 tar -zxvf Python-3.6.0.tgz
756 ls
757 cd ./Python-3.6.0
758 ./configure
759 make
760 make install
761 python --version
762 python -V
763 python3 -V
764 ls -al /usr/bin | grep python
765 mv /usr/bin/python /usr/bin/python.bak
766 ln -s /usr/local/bin/python3 /usr/bin/python
767 python -V
768 vi /usr/bin/yum
769 vi /usr/libexec/urlgrabber-ext-down
770 history
vi两步: 打开后将 #!/usr/bin/python 改为 #!/usr/bin/python2.7,保存退出即可。