linux下安装python3

一、下载python3

wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tgz

二、检查依赖包并安装

1.

rpm -qa zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

2.如果缺少，则安装

yum -y install openssl

 

三、 创建安装目录

mkdir -p /opt/python3

四、解压安装包

tar -xvf Python-3.7.2.tgz

五、进去解压后的目录，编译安装

1.cd Python-3.7.2

2. ./configure --prefix=/opt/python3             # /opt/python3 是安装目录

3.make

4.make install  或者make && make install

5.稍等大概5分钟

六、建立python3的软链

ln -s /opt/python3 /usr/bin/python3

七、将/opt/python3/bin加入PATH

1.vim ~.bash_profile

2.修改path,并保存退出

PATH=$PATH:$HOME/bin:/opt/python3/bin

3.变量生效

source ~.bash_profile

八、创建一下pip3的软链接

ln -s /opt/python3/bin/pip3 /usr/bin/pip3

九、检查python3和pip是否可以正常使用

1.执行命令

python3 -V

 

2.执行命令

pip3 -V