python2.7.X 升級至Python3.6.X，macpython2.7升級3.6

python2.7.X 升級至Python3.6.X，macpython2.7升級3.6

python2.7.X 升級至Python36.X

安裝Python3

項目是在py3環境下進行編碼的，正好Centos預設的py版本是2，我們還需要安裝py3才能讓程式run起來，在此之前，需要安裝開發套件，因為要編譯安裝Python
[root@CentOS ~]# yum -y group install "Development Tools"

安裝Python的依賴包，不安裝依賴可能安裝完成後沒有pip3 軟體。
[root@CentOS ~]# yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel vim

下載目前最新的Python3.5.x
[root@CentOS ~]# wget https://www.python.org/ftp/python/3.5.3/Python-3.5.3.tgz
可能你需要通過yum -y install wget

解壓編譯安裝
[root@CentOS ~]# tar xf Python-3.5.3.tgz
[root@CentOS ~]# cd Python-3.5.3
[root@CentOS Python-3.5.3]# ./configure --prefix=/usr/local/python3.5
[root@CentOS Python-3.5.3]# make
[root@CentOS Python-3.5.3]# make altinstall

 

為pip3和python3建立連結
[root@CentOS Python-3.5.3]# ln -fs /usr/local/python3.5/bin/python3 /usr/local/bin/
[root@CentOS Python-3.5.3]# ln -fs /usr/local/python3.5/bin/pip3 /usr/local/bin/
[root@CentOS Python-3.5.3]# mv /usr/bin/python/usr/bin/python_old
[root@CentOS Python-3.5.3]# ln -fs /usr/local/python3.5/bin/python3.5 /usr/bin/python
[root@CentOS Python-3.5.3]# ln -fs /usr/local/python3.5/bin/pip3.5 /usr/bin/pip

驗證安裝
[root@CentOS Python-3.5.3]# pip -V
pip 9.0.1 from /usr/local/python3.5/lib/python3.5/site-packages (python 3.5)
[root@CentOS Python-3.5.3]# python -V
Python 3.5.3

修改yum檔案，否則yum將無法下載
vim /usr/bin/yum
將#!/usr/bin/python修改為#!/usr/bin/python2.7儲存即可生效