centos7.3 Change Python version---2.7.5 to 3.6.4

1. Preparation

• System version

  cat /etc/redhat-release

• Install dependent packages

  yum -y install wget sqlite-devel xz gcc automake zlib-devel openssl-devel epel-release

2. Download the decompression installation python3.6.4

wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgztar zxvf Python-3.6.4.tgzcd Python-3.6.4./configuremake && make install

• Rename the original Python

  mv /usr/bin/python /usr/bin/python.bak

• Creating a soft connection

  ln -s /usr/local/bin/python3 /usr/bin/python

• View Python version, has become 3.6.4
  

3. Yum is not available after updating Python version

You need to modify usr/libexec/urlgrabber-ext-down and /usr/bin/yum two files at this time

Modify the first line parameter in these two files, change #!/usr/bin/python to #!/usr/bin/python2.7 and save exit.

• Yum resumes normal use after completion
  

centos7.3 Change Python version---2.7.5 to 3.6.4