https://www.cnblogs.com/kimyeee/p/7250560.html
linux默自带python2.6(centos7好像是2.7),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
本教程适用centos,debain,ubuntu需要一些相应的修改
一、安装python3.6
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 gcc
PS:强调一下readline依赖包,要是这个不安装,你在python交互环境下执行的不能使用后退键,只能用ctrl+后退键,对初学者及其不友好,踩过坑重新安装的路由
2.下载Python3
下载地址 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
make install 或者 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
保存退出。
source 环境变量
$ source ~/.bash_profile
检查Python3及pip3是否正常可用:
python3是自带pip的
$ python3 -V
Python 3.6.1
$ pip3 -V
pip 9.0.1from/usr/local/python3/lib/python3.6/site-packages (python 3.6)
7.不行的话在创建一下pip3的软链接
# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3