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pip install virtualenv
pip install virtualenvwrapper

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which python3 #will output the python3 path such as /usr/bin/python3
mkvirtualenv --python=/usr/bin/python3 my_new_project

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Running virtualenv with interpreter /usr/local/bin/python3
Using base prefix '/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4'
New python executable in my_new_project/bin/python3.4
Also creating executable in my_new_project/bin/python
Installing setuptools, pip...done.
(my_new_project)MacBook-Air-de-Pierre:Repositories Pierre$ 

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cd /Users/Pierre/Repositories/Perso
mkdir trackr
cd trackr

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trackr
└── trackr
    ├── manage.py
    └── trackr
        ├── __init__.py
        ├── settings.py
        ├── urls.py
        └── wsgi.py

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trackr
├── README.rst
├── docs
├── requirements
└── trackr
    ├── manage.py
    └── trackr
        ├── __init__.py
        ├── settings.py
        ├── urls.py

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trackr
├── README.rst
├── docs
├── requirements
│   ├── base.txt
│   ├── local.txt
│   ├── production.txt
│   └── test.txt
└── trackr
    ├── manage.py

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import os

SECRET_KEY = os.environ['DJANGO_SECRET_KEY']

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import os

from django.core.exceptions import ImproperlyConfigured

def get_env_variable(var_name):
    """ Gets the environment variable or returns exception. """
    try:
        return os.environ[var_name]
    except KeyError:
        error_msg = "Set the {} environment variable".format(var_name)

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CONFIG_ROOT = os.path.dirname(os.path.dirname(__file__))
PROJECT_ROOT = os.path.abspath(os.path.join(CONFIG_ROOT, os.pardir))