An example of running Django 1.7.4 under Python 3.4.2 on Ubuntu 14.04

Hello.



In this example, I will show one of the ways to run the current version of Django under fresh Python.

Python 3.4.2 | Release Date: 2014-10-13
Django 1.7.4 | January 27, 2015 virtualenvwrapper and pyenv

will be used : - virtualenvwrapper will work with the "system" python2 - we will use pyenv to install the latest version of Python - we will use virtualenvwrapper to create a virtual environment with the latest version of Python "inside"




System Information


The launch will be done on Ubuntu 14.04.1 LTS:

devel787@vbox64:~$ uname -a
Linux vbox64 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
devel787@vbox64:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty


After installing Ubuntu, bash is available by default:

devel787@vbox64:~$ echo $SHELL
/bin/bash
devel787@vbox64:~$ bash --version
GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu)


Also, by default, 2 versions of Python are immediately preinstalled:

devel787@vbox64:~$ python --version
Python 2.7.6
devel787@vbox64:~$ python3 --version
Python 3.4.0


Install virtualenvwrapper


virtualenvwrapper is a convenient wrapper around virtualenv.

To install virtualenvwrapper you need to perform some actions.

Get the new Ubuntu package lists:

devel787@vbox64:~$ sudo apt-get update


Install pip:

devel787@vbox64:~$ sudo apt-get install python-pip


Install virtualenvwrapper:

devel787@vbox64:~$ sudo pip install virtualenvwrapper


Configure virtualenvwrapper:

devel787@vbox64:~$ echo '' >> ~/.bashrc
devel787@vbox64:~$ echo '# virtualenvwrapper' >> ~/.bashrc
devel787@vbox64:~$ echo 'export WORKON_HOME=$HOME/.virtualenvs' >> ~/.bashrc
devel787@vbox64:~$ echo 'export PROJECT_HOME=$HOME/vwrapperhome' >> ~/.bashrc
devel787@vbox64:~$ echo 'source /usr/local/bin/virtualenvwrapper.sh' >> ~/.bashrc
devel787@vbox64:~$ echo '' >> ~/.bashrc


Create a folder for PROJECT_HOME from the settings above:

devel787@vbox64:~$ mkdir ~/vwrapperhome


Apply settings:

devel787@vbox64:~$ source ~/.bashrc


Now, virtualenvwrapper commands should be available, for example:

devel787@vbox64:~$ workon
devel787@vbox64:~$ virtualenvwrapper


Pyenv installation


pyenv is a handy utility for managing Python versions.

To install pyenv, you need to perform some steps.

Install the necessary dependencies:

devel787@vbox64:~$ sudo apt-get install make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm


Install git:

devel787@vbox64:~$ sudo apt-get install git


Install pyenv:

devel787@vbox64:~$ cd
devel787@vbox64:~$ git clone git://github.com/yyuu/pyenv.git .pyenv


Configure pyenv:

devel787@vbox64:~$ echo '' >> ~/.bashrc
devel787@vbox64:~$ echo '# pyenv' >> ~/.bashrc
devel787@vbox64:~$ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
devel787@vbox64:~$ echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
devel787@vbox64:~$ echo 'eval "$(pyenv init -)"' >> ~/.bashrc
devel787@vbox64:~$ echo '' >> ~/.bashrc


Apply settings:

devel787@vbox64:~$ exec $SHELL


Now we should have pyenv commands available, for example, you can see the utility version:

devel787@vbox64:~$ pyenv --version
pyenv 20150204


Install Python 3.4.2


pyenv provides the ability to install many different versions of Python.

To view all available versions, you must do:
devel787@vbox64:~$ pyenv install --list
Available versions:
  2.1.3
  2.2.3
  2.3.7
  2.4
  2.4.1
  2.4.2
  2.4.3
  2.4.4
  2.4.5
  2.4.6
  2.5
  2.5.1
  2.5.2
  2.5.3
  2.5.4
  2.5.5
  2.5.6
  2.6.6
  2.6.7
  2.6.8
  2.6.9
  2.7-dev
  2.7
  2.7.1
  2.7.2
  2.7.3
  2.7.4
  2.7.5
  2.7.6
  2.7.7
  2.7.8
  2.7.9
  3.0.1
  3.1-dev
  3.1.3
  3.1.4
  3.1.5
  3.2-dev
  3.2
  3.2.1
  3.2.2
  3.2.3
  3.2.4
  3.2.5
  3.2.6
  3.3.0
  3.3-dev
  3.3.1
  3.3.2
  3.3.3
  3.3.4
  3.3.5
  3.3.6
  3.4.0
  3.4-dev
  3.4.1
  3.4.2
  3.5-dev
  anaconda-1.4.0
  anaconda-1.5.0
  anaconda-1.5.1
  anaconda-1.6.0
  anaconda-1.6.1
  anaconda-1.7.0
  anaconda-1.8.0
  anaconda-1.9.0
  anaconda-1.9.1
  anaconda-1.9.2
  anaconda-2.0.0
  anaconda-2.0.1
  anaconda-2.1.0
  anaconda3-2.0.0
  anaconda3-2.0.1
  anaconda3-2.1.0
  ironpython-dev
  ironpython-2.7.4
  ironpython-2.7.5
  jython-dev
  jython-2.5.0
  jython-2.5-dev
  jython-2.5.1
  jython-2.5.2
  jython-2.5.3
  jython-2.5.4-rc1
  jython-2.7-beta1
  jython-2.7-beta2
  jython-2.7-beta3
  miniconda-2.2.2
  miniconda-3.0.0
  miniconda-3.0.4
  miniconda-3.0.5
  miniconda-3.3.0
  miniconda-3.4.2
  miniconda-3.7.0
  miniconda3-2.2.2
  miniconda3-3.0.0
  miniconda3-3.0.4
  miniconda3-3.0.5
  miniconda3-3.3.0
  miniconda3-3.4.2
  miniconda3-3.7.0
  pypy-c-jit-latest
  pypy-c-nojit-latest
  pypy-dev
  pypy-1.5-src
  pypy-1.5
  pypy-1.6
  pypy-1.7-dev
  pypy-1.7
  pypy-1.8-dev
  pypy-1.8
  pypy-1.9-dev
  pypy-1.9
  pypy-2.0-dev
  pypy-2.0-src
  pypy-2.0
  pypy-2.0.1-src
  pypy-2.0.1
  pypy-2.0.2-src
  pypy-2.0.2
  pypy-2.1-src
  pypy-2.1
  pypy-2.2-src
  pypy-2.2
  pypy-2.2.1-src
  pypy-2.2.1
  pypy-2.3-src
  pypy-2.3
  pypy-2.3.1-src
  pypy-2.3.1
  pypy-2.4.0-src
  pypy-2.4.0
  pypy-2.4-beta1-src
  pypy-2.4-beta1
  pypy-2.5.0-src
  pypy-2.5.0
  pypy3-dev
  pypy3-2.3.1-src
  pypy3-2.3.1
  pypy3-2.4.0-src
  pypy3-2.4.0
  stackless-dev
  stackless-2.7-dev
  stackless-2.7.2
  stackless-2.7.3
  stackless-2.7.4
  stackless-2.7.5
  stackless-2.7.6
  stackless-2.7.7
  stackless-2.7.8
  stackless-3.2-dev
  stackless-3.2.2
  stackless-3.2.5
  stackless-3.3-dev
  stackless-3.3.5
  stackless-3.4.1




Install Python 3.4.2:

devel787@vbox64:~$ pyenv install 3.4.2 -v


Run 'rehash' (Rebuild the shim binaries. You should do this any time you install a new Python binary):

devel787@vbox64:~$ pyenv rehash


To view installed versions of Python, you must do:

devel787@vbox64:~$ pyenv versions
* system (set by /home/devel787/.pyenv/version)
  3.4.2


Creating a virtual environment


Now you can create a virtual environment based on Python 3.4.2.

By default, the Python 3.4.2 binary will be available in '~ / .pyenv / versions /':

devel787@vbox64:~$ ls -lahF ~/.pyenv/versions/3.4.2/bin/python
lrwxrwxrwx 1 devel787 devel787 9 Feb 10 16:24 /home/devel787/.pyenv/versions/3.4.2/bin/python -> python3.4*


We create a virtual environment (and immediately find ourselves “inside” it):

devel787@vbox64:~$ mkvirtualenv -p ~/.pyenv/versions/3.4.2/bin/python polls174-py342-venv


Checking the Python version:

(polls174-py342-venv)devel787@vbox64:~$ python --version
Python 3.4.2


To exit the virtual environment, you must do:

(polls174-py342-venv)devel787@vbox64:~$ deactivate


To view all virtual environments, you must do:

devel787@vbox64:~$ workon
polls174-py342-venv


You can get "back" into the virtual environment by doing:

devel787@vbox64:~$ workon polls174-py342-venv


Launch Django 'polls' app


To demonstrate the functionality of Django 1.7.4 under Python 3.4.2, run the Django 'polls' app from the Django Tutorial .

I created a repository that contains the executed Django Tutorial and the file 'requirements.txt'.

Let's go to the folder for PROJECT_HOME from the settings above:

(polls174-py342-venv)devel787@vbox64:~$ cd ~/vwrapperhome/


We’ll “clone” a repository that contains the executed Django Tutorial:

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome$ git clone https://github.com/devel787/polls174.git


Let's go to the project folder:

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome$ cd polls174/


“Fix” the project folder to our virtual environment (upon activation of the environment, we will fall into this folder):

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome/polls174$ setvirtualenvproject
Setting project for polls174-py342-venv to /home/devel787/vwrapperhome/polls174


Install Django 1.7.4:

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome/polls174$ pip install -r requirements.txt


Run the tests:

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome/polls174$ python manage.py test


Run the server for development:

(polls174-py342-venv)devel787@vbox64:~/vwrapperhome/polls174$ python manage.py runserver


Now you can click on the link
http://127.0.0.1:8000/polls/
and see the results of this example.
For / admin / Username == Password == 'admin'.

Literature


Virtual Environments | The Hitchhiker's Guide to Python
virtualenvwrapper | Installation
pyenv | Installation

Blast into PyEnv [September 18, 2014]
Building Python on Ubuntu with pyenv [March 2, 2014]
python Version Manager [November 25, 2013]
Multi-hosting django applications using nginx + uwsgi + virtualenv [May 15, 2013]

Writing your first Django app , part 1

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