python2.7.X 升级至Python3.6.X

安装Python3

 

项目是在py3环境下进行编码的，正好yczhang默认的py版本是2，咱们还须要安装py3才能让程序run起来，在此以前，须要安装开发工具包，由于要编译安装Python

[root@yczhang ~]# yum -y group install "Development Tools"

 

安装Python的依赖包，不安装依赖可能安装完成后没有pip3 软件。

[root@yczhang ~]# yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel vim

 

下载目前最新的Python3.6.x

 1 [root@yczhang ~]# wget https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz

可能你须要经过yum -y install wget

 

解压编译安装

[root@yczhang ~]# tar xf Python-3.6.0.tgz

[root@yczhang ~]# cd Python-3.6.0

[root@yczhang Python-3.6.0]# ./configure --prefix=/usr/local/python3.6

[root@yczhang Python-3.6.0]# make

[root@yczhang Python-3.6.0]# make altinstall

为pip3和python3建立连接

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3 /usr/local/bin/

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3 /usr/local/bin/

[root@yczhang Python-3.6.0]# mv /usr/bin/python /usr/bin/python_old

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3.6 /usr/bin/python

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3.6 /usr/bin/pip

验证安装

[root@yczhang Python-3.6.0]# pip -V

pip 9.0.1 from /usr/local/python3.5/lib/python3.5/site-packages (python 3.6)

[root@yczhang Python-3.6.0]# python -V

Python 3.6.0

修改yum文件，不然yum将没法下载

vim /usr/bin/yum

 

 

将

#!/usr/bin/python

 

修改成

#!/usr/bin/python2.7

 

保存便可生效