Python3 与 Python2共存

发布时间:2019-09-27 07:10:22编辑:auto阅读(2004)

    Python3 与 Python2共存

    1. 查看当前python版本

      python --version
    2. 备份python

      which python
      mv /usr/bin/python /usr/bin/python.bak
    3. 下载安装更新python3

      wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz
      tar -xvJf  Python-3.6.2.tar.xz
    4. 安装关联程序,安装编译python3

      yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
      cd Python-3.6.2
      ./configure prefix=/usr/local/python3
      make && make install
      ln -s /usr/local/python3/bin/python3 /usr/bin/python
    5. 查看python版本

      python --version
    6. 修改相关执行程序python版本

      vi /usr/bin/yum
      把#! /usr/bin/python修改为#! /usr/bin/python2
      vi /usr/libexec/urlgrabber-ext-down 
      文件里面的#! /usr/bin/python 也要修改为#! /usr/bin/python2

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