Centos安装Python3.7

1.准备编译环境

yum -y groupinstall "Development tools"
yum -y install gcc zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
yum install -y libffi-devel zlib1g-dev
yum install zlib* -y

Centos7 以下系统的要注意openssl 版本,不能低于 1.0.2
openssl 如何升级版本，请看我上一篇文章

# openssl version
OpenSSL 1.0.2o  27 Mar 2018

2.下载Python3.7.2源码包

（国外源，下载比较慢）

wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tar.xz

3.解压

tar -xvf  Python-3.7.2.tar.xz

4.创建编译安装目录并安装

需要openssl 版本在 1.0.2 及以上，否则无法导入ssl模块,pip install 也会报错

cd Python-3.7.2/
./configure --prefix=/usr/local/python3 --with-openssl=/usr/local/ssl --enable-optimizations（加快代码运行速度)
make && make install
ln -s /usr/local/python3/bin/python3 /usr/local/bin/
ln -s /usr/local/python3/bin/pip3 /usr/local/bin/

--enable-optimizations 加快代码运行效率，会导致编译时间过长，可忽略.centos6系统不要加这个,编译会卡着不动
--with-openssl=/usr/local/ssl 指定openssl安装位置 ，通过yum 安装openssl >=1.0.2版本的不需要该选项,

5.测试

#python3
Python 3.7.2 (default, Jan 10 2020, 18:08:10)
[GCC 4.8.2 20131212 (Red Hat 4.8.2-8)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>>

更换pip为国内源

#mkdir ~/.pip/
#vim ~/.pip/pip.conf
[global]
index-url = https://mirrors.aliyun.com/pypi/simple