01.centos 7 安装 python 3.7.1

centos 7 安装 python 3.7.1

https://www.python.org/downloads/source/
在官网上下载 Python-3.7.1.tar.xz 安装包，在下载时可以看到有 XZ 和 Gzip 两种格式的压缩包，这两个都可以下载使用，只是 XZ 格式的压缩包体积会更小些。

一、安装 python3 依赖包

[root@localhost /]# yum -y groupinstall "Development tools"

[root@localhost /]# yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

二、编译安装源码包

[root@localhost /]# mkdir /usr/local/python3.7.1 && cd /usr/local/python3.7.1/

[root@localhost python3.7.1]# tar -xvJf Python-3.7.1.tar.xz #这里我已经把 Python-3.7.1.tar.xz 软件包拷贝到此目录下了

[root@localhost python3.7.1]# cd Python-3.7.1/

[root@localhost Python-3.7.1]# ./configure --prefix=/usr/local/python3.7.1

[root@localhost Python-3.7.1]# make && make install

[root@localhost Python-3.7.1]# yum install libffi-devel -y

[root@localhost Python-3.7.1]# make install

三、配置软链接

[root@localhost Python-3.7.1]# ln -s /usr/local/python3.7.1/bin/python3 /usr/bin/python3

[root@localhost Python-3.7.1]# ln -s /usr/local/python3.7.1/bin/pip3 /usr/bin/pip3

[root@localhost Python-3.7.1]# python3

Python 3.7.1 (default, Dec 29 2018, 16:46:46) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

四、配置 python3/2 版本共存

[root@localhost Python-3.7.1]# vim /usr/bin/yum

#!/usr/bin/python2      //将原来的 python 改为 python2

[root@localhost Python-3.7.1]# vim /usr/libexec/urlgrabber-ext-down

#!/usr/bin/python2      //将原来的 python 改为 python2

五、查看版本信息

[root@localhost /]# python3 -V

Python 3.7.1

[root@localhost /]# python2 -V

Python 2.7.5