安装Python-3.5.2
服务器系统：CentOS Linux release 7.3.1611
下载安装包：
wget https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgz
解压文件
tar -xzf Python-3.5.2.tgz
进入目录
cd Python-3.5.2
编译安装
./configure --prefix=/usr/local/python3.5 --with-threads --enable-shared make && make altinstall
备份旧python相关命令
mv /usr/bin/pip /usr/bin/pip_old mv /usr/bin/easy_install /usr/bin/easy_install_old mv /usr/bin/python /usr/bin/python_old
新版本python命令做软连接，快捷使用
ln -s /usr/local/python3.5/lib/libpython3.5m.so /usr/lib ln -s /usr/local/python3.5/lib/libpython3.5m.so.1.0 /usr/lib ln -s /usr/local/python3.5/lib/libpython3.5m.so /usr/lib64 ln -s /usr/local/python3.5/lib/libpython3.5m.so.1.0 /usr/lib64 ln -s /usr/local/python3.5/bin/python3.5 /usr/bin/python ln -s /usr/local/python3.5/bin/easy_install-3.5 /usr/bin/easy_install ln -s /usr/local/python3.5/bin/pip3.5 /usr/bin/pip
重新加载配置
/sbin/ldconfig -v
查看已经安装的版本号：
python -V
进入Python
python
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>print("安装成功！")
安装成功！
