Centos 7上安裝Python3.x（單版本）

Centos7默認安裝的是2.7，這裏選擇安裝使用Python3.6.3

安裝Python3.6.3

一、安裝python3 須要的依賴包

yum install -y openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel gcc cc

二、下載python源碼

wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz

三、解壓和編譯

mkdir /usr/local/python3 -p tar xf Python-3.6.3.tgz cd Python-3.6.3 ./configure --prefix=/usr/local/python3 make make install

四、備份舊版python軟連接，連接新版本python

[root@localhost ~]# ls -l /usr/bin/python
lrwxrwxrwx. 1 root root 9 Oct 20 14:08 /usr/bin/python -> python2 [root@localhost ~]# ls -l /usr/bin/python2
lrwxrwxrwx. 1 root root 9 Oct 20 14:08 /usr/bin/python2 -> python2.7 [root@localhost ~]# ls -l /usr/bin/python2.7
-rwxr-xr-x. 1 root root 7136 Nov  5  2016 /usr/bin/python2.7

 

mv /usr/bin/python /usr/bin/python.bak ln -s /usr/local/python3/bin/python3 /usr/bin/python ln -s /usr/local/python3/bin/pip3 /usr/bin/pip

五、修改yum配置文件

vim /usr/bin/yum vim /usr/libexec/urlgrabber-ext-down

將第一行指定的python版本改成python2.7(#!/usr/bin/python 改成 #!/usr/bin/python2.7)

六、檢驗 Python 及 pip 版本

[root@localhost ~]# python -V
Python 3.6.3 [root@localhost ~]# pip -V
pip 9.0.1 from /usr/local/python3/lib/python3.6/site-packages (python 3.6)

參考原文地址：http://mp.weixin.qq.com/s/9fluqSWaDwkyAUMYiXF8dw（提供了另外一種共存方式）