如果本机安装了python2，尽量不要管他，使用python3运行python脚本就好，因为可能有程序依赖目前的python2环境，
比如yum！！！！！

不要动现有的python2环境！

正片开始---

  1. 安装依赖环境

    # yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

    2.下载Python3

    https://www.python.org/downloads/
# wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz

    3.安装python3

    我个人习惯安装在/usr/local/python3（具体安装位置看个人喜好）
创建目录：
# mkdir -p /usr/local/python3

    解压下载好的Python-3.x.x.tgz包(具体包名因你下载的Python具体版本不不同⽽而不不同，如：我下载的是Python3.6.1.那我这里就是Python-3.6.1.tgz)

    # tar -zxvf Python-3.6.1.tgz

    4.进入解压后的目录，编译安装。

    # cd Python-3.6.1
# ./configure --prefix=/usr/local/python3
# make && make install

    5.建立python3的软链

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

    6.并将/usr/local/python3/bin加入PATH

    # vim ~/.bash_profile
# .bash_profile
# Get the aliases and functions
# if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/usr/local/python3/bin

    export PATH按ESC，输入:wq回车退出。

    修改完记得执行行下面的命令，让上一步的修改生效：

    # source ~/.bash_profile

    检查Python3及pip3是否正常可用：

    # python3 -V
Python 3.6.1
# pip3 -V
pip 9.0.1 from /usr/local/python3/lib/python3.6/site-packages (python 3.6)

到此python3就算装好了！

Last modification：December 17th, 2021 at 05:07 pm
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