官网源码下载：https://www.python.org/downloads/source/
编译安装：
先安装:
yum -y install zlib zlib-devel
yum -y install gcc
yum install libffi-devel -y
yum -y install bzip2 bzip2-devel
yum -y install ncurses ncurses-devel
yum -y install readline readline-devel
yum -y install openssl openssl-devel
yum -y install openssl-static
yum -y install xz lzma xz-devel
yum -y install sqlite sqlite-devel
yum -y install gdbm gdbm-devel
yum -y install tk tk-devel
yum install bzip2-devel ncurses-devel gdbm-devel openssl-devel readline-devel lzma xz-devel zlib-devel sqlite-devel python-devel(python3-devel，根据python版本选择)
配置后安装：
./configure --prefix=/usr/local/python3.4 --enable-shared --enable-loadable-sqlite-extensions
修改yum文件，有python改为python2
yum命令：
vim /usr/bin/yum
#!/usr/bin/python2
yum命令中下载文件：
vi /usr/libexec/urlgrabber-ext-down
#! /usr/bin/python2
对原python改名：
mv /usr/bin/python /usr/bin/python.old
创建新的链接文件
ln -s /usr/local/python3/bin/python3 /usr/bin/python
ERROR：
./python3: error while loading shared libraries: libpython3.4m.so.1.0: cannot open shared object file: No such file or directory
复制源码下的libpython3.4m.a，libpython3.4m.so，libpython3.4m.so.1.0，libpython3.so 到/usr/lib目录下
load刚复制的模块：/sbin/ldconfig
建立软链接：ln -s /usr/local/python3.4/bin/python3 /usr/bin/python
Ubuntu编译安装软件提示：编译器无法创建可执行文件，卸载到gcc和g++后重新安装
sudo apt-get install build-essential