1.目标

将服务器自带的python版本为2.7,需要升级到python3

2.安装依赖包

yum install zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel xz xz-devel libffi-devel  -y

3.安装

3.1下载安装包

wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz

3.2解压源码包

tar -zxvf Python-3.7.0.tgz

3.3创建安装目录

mkdir /usr/local/python3

cd Python-3.7.0/

3.4安装到指定目录

./configure --prefix=/usr/local/python3

3.5编译

make && make install

4.设置软链接全局使用python3

rm -rf /usr/bin/python

rm -rf /usr/bin/python2

cd /usr/local/python3

ln -s /usr/local/python3/bin/python3 /usr/bin/python

ln -s /usr/local/bin/pip3 /usr/bin/pip

ls -l /usr/bin/python*

5.验证

python -V

6.修改yum

vi /usr/bin/yum

将 #!/usr/bin/python 改为 #!/usr/bin/python2.7，保存退出

vi /usr/libexec/urlgrabber-ext-down

将 #!/usr/bin/python 改为 #!/usr/bin/python2.7，保存退出