Preferences for pyenv ~ anaconda

In this article, I would like to write a series of flow from uninstallation to installation when a problem occurs in anaconda etc.

Environment used

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.15.2
BuildVersion:   19C57

uninstall pyenv

Follow the steps below to uninstall

--Uninstall pyenv-virtualenv

$ brew uninstall pyenv-virtualenv
Uninstalling /usr/local/Cellar/pyenv-virtualenv/1.1.3... (20 files, 62.2KB)

--Uninstall pyenv

$ brew uninstall pyenv
Uninstalling /usr/local/Cellar/pyenv/1.2.14_1... (656 files, 2.4MB)

--Delete pyenv directory

$ rm -rf $(pyenv root)

This is the same as $ rm -rf ~ / .pyenv

Install pyenv again

Install pyenv with the following command

$ brew install pyenv

Addition to `.bash_profile`

Execute the following command

$ 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

Install the python environment you want to use on pyenv

--Get a list of python versions you can install --A list of installable versions is displayed as follows.

$ pyenv install --list
Available versions:
  2.1.3
  2.2.3
  2.3.7
  2.4.0
  ...
(abridgement)
  ...
  3.0.1
  3.1.0
  3.1.1
  3.1.2
  ...
(abridgement)
  ...  
  3.6.8
  3.6.9
  3.7.0
  3.7-dev
  3.7.1
  3.7.2
  3.7.3
  3.7.4
  3.7.5
  3.7.5rc1
  3.8.0
  3.8-dev
  3.9-dev
  activepython-2.7.14
  activepython-3.5.4
  activepython-3.6.0
  anaconda-1.4.0
  anaconda-1.5.0
  anaconda-1.5.1
  anaconda-1.6.0
  anaconda-1.6.1
  anaconda-1.7.0
  ...
(abridgement)
  ... 
  anaconda3-5.1.0
  anaconda3-5.2.0
  anaconda3-5.3.0
  anaconda3-5.3.1
  anaconda3-2018.12
  anaconda3-2019.03
  anaconda3-2019.07
  anaconda3-2019.10
  ...
(abridgement)
  ...

--This time, I want to use the anaconda environment, so specify the version you want from the above list. --I want to use anaconda, so execute the following command

$ pyenv install anaconda3-2019.10

If you want normal python, just do $ pyenv install 3.7.5

Switch the environment of pyenv

--Get a list of available python environments

$ pyenv versions

--Python is out of date immediately after installation

$ python --version
Python 2.7.15

--Check the available python version

$ pyenv versions
  system
* anaconda3-2019.10 (set by /Users/******/.pyenv/version)

--Specify the entire python version with the following command

$ pyenv global anaconda3-2019.10

--Check the version of python you are using --OK if it is set to the specified version

$ python --version
Python 3.7.4

Delete the originally used anaconda

--When the newly installed version is ʻanaconda3-2019.10`, the past version remains as follows.

$ cd ~/.pyenv/versions/
$ ls
anaconda3-2019.10/ anaconda3-5.3.1/

--If you were originally using the environment ʻanaconda3-5.3.1, execute the following command. --As it is, even if you execute the rm command, it cannot be deleted with authority, so execute it with sudo`.

$ sudo rm -rf ~/.pyenv/versions/anaconda3-5.3.1/

Make sure python is called correctly

$ vim /etc/paths

--The contents of / etc / paths look like this. Priority is given from the top.

 1 /usr/local/bin
 2 /usr/bin
 3 /bin
 4 /usr/local/sbin
 5 /usr/sbin
 6 /sbin

that's all

Procedure from uninstalling pyenv to installing again (anaconda)