CentOS的安装python3

1.准备编译环境
yum groupinstall 'Development Tools'
yum install zlib-devel bzip2-devel openssl-devel ncurese-devel

2.下载python3包
wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tgz

3.解压，编译
tar -zxvf Python-3.6.8.tgz
mv Python-3.6.8 py3.6
cd py3.6

3.1执行以下脚本
./configure --prefix=/usr/local/src/py3.6
make && make install

4.更换系统默认的python和pip版本
建立指向新python3和PIP 3的软链接
ln -s /usr/local/src/py3.6/bin/python3.6 /usr/bin/python3
ln -s /usr/local/src/py3.6/bin/pip3 /usr/bin/pip3

5.检查蟒和PIP版本
python -v
pip -v

6.进入docker容器：
docker exec -it 3a3afa942911 bash # 3a3afa942911为容器ID