Steps from installing Python 3 to creating a Django app

Confirmation of Mac pre-installation

$ python --version
Python 2.7.10
$ which python
/usr/bin/python

Install Python 3 with Homebrew

If you install it with Homebrew, it will be convenient because it will symbolically link python3.x to the python3 command or the pip command described later.

--XCode is already installed --homebrew is already installed

Confirm installation version

$ brew search python
app-engine-python             [email protected]             micropython                   python-markdown               wxpython
boost-python                  gst-python                    python                        python3                       zpython
caskroom/cask/kk7ds-python-runtime                                          caskroom/cask/mysql-connector-python

Installation

brew install python3

PATH setting

~/.bash_profile

export PATH=/usr/local/bin:$PATH

$ source ~/.bash_profile
$ python -V
Python 2.7.10
$ python3 -V
Python 3.6.1

pip installation

Python package manager. It will come with you when you install python3.

$ pip3 list
DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
pip (9.0.1)
setuptools (32.2.0)
wheel (0.29.0)

Put pip.conf, specify the format, and it was warned, so it corresponds. Mac seems to be in $ HOME / Library / Application Support / pip / pip.conf, but I didn't have it, so I created it.

$ cd /Users/kumanoshuta/Library/"Application Support"
$ mkdir pip
$ cd pip
$ vi pip.conf

[list]
format=columns

$ pip3 list
Package    Version
---------- -------
pip        9.0.1  
setuptools 32.2.0 
wheel      0.29.0 

Install pyenv

It provides a virtual environment for switching the version of python itself and the packages used.

I'm wondering if version switching is necessary or if docker or vergrant is fine, so I'll omit it.

Django installation

$ pip3 install django
Collecting django
  Downloading Django-1.11.2-py2.py3-none-any.whl (6.9MB)
    100% |████████████████████████████████| 7.0MB 207kB/s 
Collecting pytz (from django)
  Downloading pytz-2017.2-py2.py3-none-any.whl (484kB)
    100% |████████████████████████████████| 491kB 1.7MB/s 
Installing collected packages: pytz, django
Successfully installed django-1.11.2 pytz-2017.2

$ pip3 list
Package    Version
---------- -------
Django     1.11.2 
pip        9.0.1  
pytz       2017.2 
setuptools 32.2.0 
wheel      0.29.0 

Generate and launch a Django app

$ django-admin startproject mysite
$ python3 manage.py runserver 0.0.0.0:8000
Performing system checks...

System check identified no issues (0 silenced).

You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.

June 13, 2017 - 04:16:41
Django version 1.11.2, using settings 'mysite.settings'
Starting development server at http://0.0.0.0:8000/

I got an error, but I was able to start it.

Next, do DB settings