linux下安裝python3.6.6

1.到python的官網去下載python3.6.3安裝包，必須是Linux版本的

2.在/usr/tmp下下載python安裝包

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

3.解壓python到/usr/local目錄下　

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

 4.安裝必要組件

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

yum install gc

 #安裝openssl-devel，否則會忽略pip安裝失敗,pip command not found ，但是沒有error,

yum install openssl-devel

 5.安裝

cd Python-3.6.6

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

make && make install

6.軟連接，相當於快捷方式　

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