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，我们还需要安装py3才能让程序run起来，在此之前，需要安装开发工具包，因为要编译安装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

可能你需要通过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创建链接

[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，否则yum将无法下载

vim /usr/bin/yum

将

#!/usr/bin/python

修改为

#!/usr/bin/python2.7

保存即可生效