centos7中python2.7升级到python3.7

一、下载源码包

# 切换到root目录
cd /root/

# 安装wget
yum -y install wget

# 使用wget下载到目录
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tar.xz

# 解压
tar xvf Python-3.7.0.tar.xz

二、安装依赖

yum install openssl-devel bzip2-devel expat-devel gdbm-devel sqlite-devel libffi-devel

三、编译安装

# 切换到解压后的目录Python-3.7.0
cd Python-3.7.0

# 编译
./configure --prefix=/usr/local/python3.7 --enable-shared CFLAGS=-fPIC

# 生成安装文件，进行安装
make && make install

四、配置环境

# 备份python软连接,pip如果不存在就不用备份
mv -i /usr/bin/python /usr/bin/python.bak
mv -i /usr/bin/pip /usr/bin/pip.bak

# 创建python3的连接
ln -sv /usr/local/python3.7/bin/python3 /usr/bin/python
ln -sv /usr/local/python3.7/bin/pip3 /usr/bin/pip

# 配置动态库
vim /etc/ld.so.conf.d/python.conf
# 写入内容
/usr/local/python3.7/lib

五、解决yum和防火墙问题

# 修改下面几个文件内容的第一行的python为python2.7
vim /usr/libexec/urlgrabber-ext-down
vim /user/bin/yum
vim /usr/bin/firewall-cmd
vim /usr/bin/firewall-offline-cmd
vim /usr/sbin/firewalld

六、修改pip源为阿里云

cd /root/
mkdir .pip
cd .pip
touch pip.conf

#把下列内容写入到pip.conf文件
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host=mirrors.aliyun.com