Ubuntu安装pyenv实现python多版本控制
git clone git://github.com/yyuu/pyenv.git ~/.pyenv
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
exec $SHELL -l
查看可安装的版本
pyenv install --list
比如安装python2.7.14和python3.6.3版本
pyenv install 2.7.14 -v
pyenv install 3.6.3 -v
设置其为全局python
pyenv global 2.7.14 3.6.3
查看是否安装成功
ltq@lab:~$ python
Python 2.7.14 (default, Nov 25 2017, 23:00:16)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
ltq@lab:~$ python3
Python 3.6.3 (default, Nov 27 2017, 22:54:07)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
另外，每当你增删了 Python 版本或带有可执行文件的包（如 pip）以后，都应该执行一次本
pyenv rehash
更多命令参考pyenv-github，或者
ltq@lab:~$ pyenv -h
Usage: pyenv <command> [<args>]
Some useful pyenv commands are:
commands List all available pyenv commands
local Set or show the local application-specific Python version
global Set or show the global Python version
shell Set or show the shell-specific Python version
install Install a Python version using python-build
uninstall Uninstall a specific Python version
rehash Rehash pyenv shims (run this after installing executables)
version Show the current Python version and its origin
versions List all Python versions available to pyenv
which Display the full path to an executable
whence List all Python versions that contain the given executable
See `pyenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/pyenv/pyenv#readme