homebrew, pyenv, anaconda, Jupyter Notebook

environment

Overview

--Homebrew installation --pyenv installation --Anaconda installation -(I gave up building a virtual environment) --Start Jupyter Notebook

Detailed procedure

1. Install Homebrew

terminal


$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

2. Homebrew environment update

For the time being, it was said to be Already up-to-date.

3. Install pyenv

terminal


$ brew install pyenv
$ echo 'eval "$(pyenv init -)"' >> ~/.zshrc

$ exec $SHELL -l

4. Install Anaconda

terminal


$ pyenv install anaconda3-2019.10
$ pyenv global anaconda3-2019.10

It seems that pyenv global is trying to run the corresponding Python version in all directories. If you want to use the corresponding version only in a specific directory, it seems that you should do something like pyenv local anaconda3-2019.10.

5. Confirmation of installation completion

terminal


$ python
Python 3.7.4 (default, Aug 13 2019, 15:17:50)
[Clang 4.0.1 (tags/RELEASE_401/final)] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

If you type python and the above appears, the installation is successful. (For v.3 series) Exit Python's interactive shell by pressing Ctrl + D (or typing quit ()).

That's right, but this doesn't work.

6. Try installing a different version of Anaconda

terminal


$ pyenv install anaconda3-5.3.1
$ pyenv global anaconda3-5.3.1

$ python 3

terminal


Python 3.6.1 (v3.6.1:69c0db5050, Mar 21 2017, 01:21:04) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

So there is no sign of anaconda

7. Look through PATH

terminal


$ 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
$ pyenv rehash
$ python3
Python 3.7.0 (default, Jun 28 2018, 07:39:16) 
[Clang 4.0.1 (tags/RELEASE_401/final)] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.

Oh. Signs of Anaconda.

terminal


$ jupyter notebook

It started with!

8. Cause

I thought it was zsh from macOS Catalina, The update user is bash, You should change it to zsh.

In macOS 10.15 Catalina, the default login shell is changed from "bash" to "zsh".

Well, I have to change the shell to zsh. If that happens, Anaconda and pyenv will not move. I wonder if ... Good luck.

reference

[Jupyter Notebook] Let's know how to use it effectively [Python / Machine learning]

Understanding the essence of environment construction (concepts such as PATH) [Python]

[Note from installing Homebrew to building an Anaconda environment for Python with pyenv] (https://qiita.com/aical/items/2d066801a7464a676994)

[Keras / TensorFlow] Keras (Tensorflow) environment construction

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