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下载Python3
wget http://python.org/ftp/python/3.4.1/Python-3.4.1.tar.xz - 安装
yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel
tar xvf Python-3.4.1.tar.xz
cd Python-3.4.1./configure --prefix=/opt/python3
make
make installcd /opt/python3/bin/
cp python3 /usr/bin/
cd /usr/bin/
mv python python.bak
mv python3 python