Creating amateur python environment settings (for MAC)

At the beginning

Let's write the setting order of python so that the true beginner can understand. However, it is assumed that you have enough knowledge about the terminal (something black screen). It is for setting tensorflow for deep learning, but aim for a level where the library can be set. Or rather, I bought a macbook Pro and wrote my own notes that I was rebuilding.

homebrew The one that is convenient for installation and settings. from here. Http://brew.sh/index_ja.html ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" But it looks good.

pyenv and pyenv-virtualenv

When using python, it seems that it is better to distinguish between the part used as a system and the part that you move by yourself, so I will put in a tool for managing python. Don't get in the way of people who work hard. No detailed explanation will be given. $ brew install pyenv-virtualenv It seems that you can enter all at once.

PATH setting

I will describe it in detail because it is a part that amateurs do not understand well. Even if you install python, if you do not specify where the installed program is, you will not know where you went and you will have trouble running it.

1. Create a configuration file It seems that the setting contents of PATH are described in .bash_profile, but since it may not be a new MAC, I will make it. Check with cd or ls and create with $ touch .bash_profile. The location is directly under the user's folder. (Reference) http://motomichi-works.hatenablog.com/entry/2016/03/02/103207 As a caveat, it is necessary to display it because it is not normally seen from the Finder. [Inforati, a hidden technique to show hidden files and folders with Mac keyboard shortcuts](http://inforati.jp/apple/mac-tips-techniques/system-hints/how-to-show-hidden-file- in-open-save-dialog-in-mac-os-easily.html)
2. PATH setting It seems that there are two types of schools below, although it seems to be where to create python itself (because the program language is also a program) and library folders. The upper one is closer to the official explanation, but the lower one may be more suitable for experts as the original directory structure of linux. It feels like it's lined up with the various files that are set by default in the mac, so I interpret it as a professional craftsman's feeling that the tools are lined up all over. Certainly, at the top, it feels like you shouldn't create a folder at the top of My Documents. If you do not set the PATH, you will get an error later.

.bash_profile

export PYENV_ROOT=$HOME/.pyenv
export PATH=$PYENV_ROOT/bin:$PATH
val "$(pyenv init -)"

.bash_profile

if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi
export PYENV_ROOT=/usr/local/var/pyenv
if which pyenv-virtualenv-init > /dev/null; then eval "$(pyenv virtualenv-init -)"; fi

Introduction of python

$ pyenv install (The version you want to include)

Introducing the library

Use pip.