centos7 安装 python3

sudo yum -y groupinstall "Development tools"
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 libffi-devel
##### https://www.python.org/ftp/python/ 选择要安装的版本

wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0a1.tar.xz
cd ~/Download
tar -xvJf  Python-3.7.0a1.tar.xz
cd Python-3.7.0a1
./configure --prefix=/usr/local/bin/python3
sudo make
sudo make install


### 创建软连接
ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3

### 安装 pip3
cd ~/Download
wget https://bootstrap.pypa.io/get-pip.py
python3 ./get-pip.py

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