CentOS 7 下安装 python3

一

安装基本环境(主要是这步,否则后面会出很多问题)

sudo 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

二

安装python3

sudo mkdir /usr/local/python3

//下载python3
wget --no-check-certificate https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tgz

//解压缩
tar -xzvf Python-3.6.2.tgz

cd Python-3.6.2/

//编译
sudo ./configure --prefix=/usr/local/python3

sudo make
sudo make install

//建立软连接
sudo ln -s /usr/bin/python3/bin/python3 /usr/bin/python3

//参考
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

//生效
source ~/.bash_profile

三

测试

终端输入查看版本信息
python3
pip3

四

如果pip无效 安装 pip

//下载pip
wget --no-check-certificate https://github.com/pypa/pip/archive/9.0.1.tar.gz

//解压缩
tar -xzvf 9.0.1.tar.gz

cd pip-9.0.1/
python3 setup.py install