linux下安装python3.6.6

1.到python的官网去下载python3.6.3安装包，必须是Linux版本的

2.在/usr/tmp下下载python安装包

wget https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz

3.解压python到/usr/local目录下　

tar -zxvf Python-3.6.6.tgz -C /usr/local

 4.安装必要组件

 #安装gcc在./configure时会error,configure: error: no acceptable C compiler found in $PATH

yum install gc

 #安装openssl-devel，否则会忽略pip安装失败,pip command not found ，但是没有error,

yum install openssl-devel

 5.安装

cd Python-3.6.6

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

make && make install

6.软连接，相当于快捷方式　

ln -s /usr/local/python3/bin/python3.6 /usr/bin/python3

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

7.使用pip， python命令