Linux上安装Python3

1. 安装支持包

yum -y groupinstall "Development tools"
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

2. 下载源代码

wget https://www.python.org/ftp/python/3.6.7/Python-3.6.7.tar.xz

3. 安装

mkdir -p /usr/local/python3
mv Python-3.6..tar.xz /usr/local/python3/
cd  /usr/local/python3
tar -xvJf  Python-3.6..tar.xz
cd Python-3.6.
./configure --prefix=/usr/local/python3
make && make install

4. 创建软链接

ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

5. 测试

python3

6. 注意

centos7原本就安装了Python2，而且这个Python2不能被删除，因为有很多系统命令，比如yum都要用到。

不要把Python3的安装目录覆盖Python2

：）  enjoy