python2.7.X 升级至Python3.6.X

Posted 2020-12-27 huandada

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

[[email protected] ~]# 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。

[[email protected] ~]# 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 [[email protected] ~]# 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

[[email protected] ~]# tar xf Python-3.6.0.tgz

[[email protected] ~]# cd Python-3.6.0

[[email protected] Python-3.6.0]# ./configure --prefix=/usr/local/python3.6

[[email protected] Python-3.6.0]# make

[[email protected] Python-3.6.0]# make altinstall

为pip3和python3创建链接

[[email protected] Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3 /usr/local/bin/

[[email protected] Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3 /usr/local/bin/

[[email protected] Python-3.6.0]# mv /usr/bin/python /usr/bin/python_old

[[email protected] Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3.6 /usr/bin/python

[[email protected] Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3.6 /usr/bin/pip

验证安装

[[email protected] Python-3.6.0]# pip -V

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

[[email protected] 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