git clone git://github.com/yyuu/pyenv.git ~/.pyenv
yum -y groupinstall "Development Tools"
yum -y install readline-devel zlib-devel bzip2-devel sqlite-devel openssl-devel
yum install readline readline-devel readline-static -y
yum install openssl openssl-devel openssl-static -y
yum install sqlite-devel -y
yum install bzip2-devel bzip2-libs -y
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >>~/.bash_profile
echo 'eval "$(pyenv init -)"' >>~/.bash_profile
source ~/.bash_profile
exec $SHELL -l
#安装指定版本的python
pyenv install 3.5.4（如果下载较慢，可以手动下载Python-3.5.4.tar.xz安装包上传到/root/.pyenv/cache下，在执行这条命令）
版本切换
pyenv global 3.5.4
安装virtualenv
pip install virtualenv
2种方法创建python3的虚拟环境
virtualenv /data/python/env3.5.4 --python=python3
virtualenv -p /root/.pyenv/versions/3.5.4/bin/python3 /data/python/env3.5.4
启动虚拟环境
source /data/python/env3.5.4/bin/activate
退出虚拟环境
deactivate