ubuntu16.04 使用pyenv 同时使用python3 python2

1. git clone https://github.com/pyenv/pyenv.git ~/.pyenv

2. echo'export PYENV_ROOT="$HOME/.pyenv"'>>~/.bashrc

echo'export PATH="$PYENV_ROOT/bin:$PATH"'>>~/.bashrc

echo'eval "$(pyenv init -)"'>>~/.bashrc

3. exec$SHELL
4. 安装依赖库

先升级 sudo apt-get update

然后装各种依赖包

apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev xz-utils tk-dev

5. 安装好了, 现在安装python3.6.1

pyenv install 3.6.1

6. 查看已经安装的python版本  pyenv versions