Linux 安装Python3

1. 首先安装一些python需要的库

yum groupinstall 'Development Tools'
yum install zlib-devel bzip2-devel  openssl-devel ncurses-devel sqlite-devel

2. 下载python 源码编译安装

wget  https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tar.xz
tar Jxvf  Python-3.5.0.tar.xz
cd Python-3.5.0
./configure --prefix=/usr/local/python3
make && make install

3. python3.5 源码安装时会自动安装pip
   如果没有pip，可以手动下载get-pip.py安装pip。

wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py

4. 最后创建软链接

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