1.先安装相关依赖
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
yum install libffi-devel -y
2.下载Python3安装包
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
tar -zxvf Python-3.7.0.tgz
3.编译安装
cd Python-3.7.0
./configure
make
make install
4.设置系统默认使用Python3
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/bin/python3 /usr/bin/python
mv /usr/bin/pip /usr/bin/pip.bak
ln -s /usr/local/bin/pip3 /usr/bin/pip
5.由于CentOS的yum使用的是python2，所以需要做一些修改
vi /usr/libexec/urlgrabber-ext-down
修改：#! /usr/bin/python2.7
vi /usr/bin/yum
修改：#! /usr/bin/python2.7
如果需要装docker-compose，现在就可以安装了
pip install --upgrade pip
pip install docker-compose
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