[PYTHON] pyenv memo

environment

Macos Catalina 10.15.1

install & check folder

$ brew install pyenv
$ cd ~/.pyenv

you can also install by git

list packages and install python3.6.7 python3.6.8

$ pyenv install -l
$ pyenv install 3.6.7 3.6.8
$ pyenv versions
* system(set by /Users/xxxx/.python-version)
  3.6.7
  3.6.8

create virtual environment

pyenv virtualenv python_version environment_name
$ pyenv virtualenv 3.6.7 environ_3.6.7
$ pyenv versions
  system
  3.6.7
  3.6.7/envs/environ_3.6.7
  environ_3.6.7
  ...

delete virtual environment

$ pyenv uninstall environ_3.6.7
$ pyenv versions
  system
  3.6.7
  ...

change global python version

pyenv global python_version[or python_virtual_environment]
$ pyenv global environ_3.6.7
(environ_3.6.7) xxxxxx:~ user$ 
$ python -V
Python 3.6.7
$ cd ~/.pyenv
$ vi version
 environ_3.6.7
if you delete this "version" file, the global python will change to system python

switch to environment

pyenv local python_version[or python_virtual_environment]
$ pyenv local 3.6.8
(3.6.8) xxxxxx:~ user$ 
$ python -V
Python 3.6.8