Django is popular Web framework for writing web applications. With django you can built faster and scalable applications, without writing the code from scratch (without reinventing the wheel). Web framework were design to aid programmer to create applications. These web framework are the core and takes care of functionalities like user session managemet, database connectivity etc.
refer the article for installing Python3: Installing Python3 and pip3 on centos 7
You can use pip to install the virtual environment and verify it using pip list.
[root@cms ~]# pip install virtualenv
Collecting virtualenv
Downloading virtualenv-15.1.0-py2.py3-none-any.whl (1.8MB)
100% |████████████████████████████████| 1.8MB 236kB/s
Installing collected packages: virtualenv
Successfully installed virtualenv-15.1.0
[root@cms ~]#
[root@cms ~]# pip 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 (19.2)
virtualenv (15.1.0)
Create virtual environment using virtualenv command. This command will create a directory and setup all the files.
[root@cms ~]# virtualenv env_mysite Using base prefix '/usr' New python executable in /root/env_mysite/bin/python3.4 Also creating executable in /root/env_mysite/bin/python Installing setuptools, pip, wheel...done.
Now, you can activate the virtual environment. The ssh prompt will change as below. After that you can verify the Python version.
[root@cms ~]# source env_mysite/bin/activate (env_mysite) [root@cms ~]# (env_mysite) [root@cms ~]# python Python 3.4.5 (default, Oct 20 2016, 22:54:51) [GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> quit() (env_mysite) [root@cms ~]#
Let’s install django into the virtual environemt.
(env_mysite) [root@cms ~]# pip install django
Collecting django
Downloading Django-1.10.3-py2.py3-none-any.whl (6.8MB)
100% |████████████████████████████████| 6.8MB 179kB/s
Installing collected packages: django
Successfully installed django-1.10.3
(env_mysite) [root@cms ~]# pip 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.
Django (1.10.3)
pip (9.0.1)
setuptools (29.0.1)
wheel (0.29.0)
(env_mysite) [root@cms ~]#
Django framework has been installed, now you start a new project. This command will create a new directory in the working directory.
(env_mysite) [root@cms env_mysite]# django-admin startproject mysite
(env_mysite) [root@cms env_mysite]# tree mysite/
mysite/
├── manage.py
└── mysite
├── __init__.py
├── settings.py
├── urls.py
└── wsgi.py
1 directory, 5 files
(env_mysite) [root@cms env_mysite]#
Start the application using the below command.
(env_mysite) [root@cms mysite]# pwd /root/env_mysite/mysite (env_mysite) [root@cms mysite]# python manage.py runserver 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. November 30, 2016 - 09:01:01 Django version 1.10.3, using settings 'mysite.settings' Starting development server at http://127.0.0.1:8000/ Quit the server with CONTROL-C.
It’s giving notification, you also need the run the below command as well.
python manage.py migrate
python manage.py createsuperuser
By default, the application will run on the localhost. If you need to access on remote server, then the IP address needs to be added to ‘ALLOWED_HOSTS’ section in file ~/env_mysite/lib/python3.4/site-packages/django/http/request.py.
(env_mysite) [root@cms mysite]# python manage.py runserver 192.168.56.110:8000 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. November 30, 2016 - 09:09:17 Django version 1.10.3, using settings 'mysite.settings' Starting development server at http://192.168.56.110:8000/ Quit the server with CONTROL-C. [30/Nov/2016 09:09:33] "GET / HTTP/1.1" 200 1767 [30/Nov/2016 09:09:38] "GET / HTTP/1.1" 200 1767
Now, use a web browser to check your application:
http://192.168.56.110:8000/ http://192.168.56.110:8000//admin
Upon Success, you will get the bellow message.
It worked! Congratulations on your first Django-powered page.
Press ‘Clt + C’ to quit the application and ‘deactivate’ command to leave the virtual environment.
(env_mysite) [root@cms mysite]# deactivate
I really like django. Hope, you will like too. It’s versatile.
krishna@ubuntu:~$ python3 –version
Python 3.5.2
krishna@ubuntu:~$ sudo apt-get install python3-pip
krishna@ubuntu:~$ pip3 –version
pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5)
krishna@ubuntu:~$
krishna@ubuntu:~$ mkdir DjangoProjects
krishna@ubuntu:~$ cd DjangoProjects/
krishna@ubuntu:~/DjangoProjects$ mkdir FirstProject
krishna@ubuntu:~/DjangoProjects$ cd FirstProject/
krishna@ubuntu:~/DjangoProjects/FirstProject$ pip3 install virtualenv
Collecting virtualenv
Downloading virtualenv-15.1.0-py2.py3-none-any.whl (1.8MB)
100% |████████████████████████████████| 1.8MB 575kB/s
Installing collected packages: virtualenv
Successfully installed virtualenv
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the ‘pip install –upgrade pip’ command.
krishna@ubuntu:~/DjangoProjects/FirstProject$
krishna@ubuntu:~/DjangoProjects/FirstProject$ virtualenv -p python3 env
Already using interpreter /usr/bin/python3
Using base prefix ‘/usr’
New python executable in /home/krishna/DjangoProjects/FirstProject/env/bin/python3
Also creating executable in /home/krishna/DjangoProjects/FirstProject/env/bin/python
Installing setuptools, pip, wheel…done.
krishna@ubuntu:~/DjangoProjects/FirstProject$
krishna@ubuntu:~/DjangoProjects/FirstProject$ source env/bin/activate
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ ls -l env/bin/
activate activate_this.py pip python python-config
activate.csh easy_install pip3 python3 wheel
activate.fish easy_install-3.5 pip3.5 python3.5
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ pip install django
Collecting django
Downloading Django-2.0-py3-none-any.whl (7.1MB)
100% |████████████████████████████████| 7.1MB 172kB/s
Collecting pytz (from django)
Downloading pytz-2017.3-py2.py3-none-any.whl (511kB)
100% |████████████████████████████████| 512kB 2.4MB/s
Installing collected packages: pytz, django
Successfully installed django-2.0 pytz-2017.3
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ pip list
Django (2.0)
pip (9.0.1)
pytz (2017.3)
setuptools (38.2.4)
wheel (0.30.0)
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ django-admin startproject mysite
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ ls -ltrh
total 8.0K
drwxrwxr-x 5 krishna krishna 4.0K Dec 11 10:56 env
drwxrwxr-x 3 krishna krishna 4.0K Dec 11 11:15 mysite
(env) krishna@ubuntu:~/DjangoProjects/FirstProject$ cd mysite/
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py startapp polls
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ ls -ltrh
total 12K
-rwxrwxr-x 1 krishna krishna 538 Dec 11 11:15 manage.py
drwxrwxr-x 3 krishna krishna 4.0K Dec 11 11:20 mysite
drwxrwxr-x 3 krishna krishna 4.0K Dec 11 11:20 polls
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ ls -ltrh polls/
total 24K
-rw-rw-r– 1 krishna krishna 63 Dec 11 11:20 views.py
-rw-rw-r– 1 krishna krishna 60 Dec 11 11:20 tests.py
-rw-rw-r– 1 krishna krishna 57 Dec 11 11:20 models.py
drwxrwxr-x 2 krishna krishna 4.0K Dec 11 11:20 migrations
-rw-rw-r– 1 krishna krishna 0 Dec 11 11:20 __init__.py
-rw-rw-r– 1 krishna krishna 85 Dec 11 11:20 apps.py
-rw-rw-r– 1 krishna krishna 63 Dec 11 11:20 admin.py
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ ls -ltrh mysite/
total 16K
-rw-rw-r– 1 krishna krishna 389 Dec 11 11:15 wsgi.py
-rw-rw-r– 1 krishna krishna 748 Dec 11 11:15 urls.py
-rw-rw-r– 1 krishna krishna 3.1K Dec 11 11:15 settings.py
-rw-rw-r– 1 krishna krishna 0 Dec 11 11:15 __init__.py
drwxrwxr-x 2 krishna krishna 4.0K Dec 11 11:20 __pycache__
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py runserver 192.168.56.102:8000
Performing system checks…
System check identified no issues (0 silenced).
You have 14 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.
December 11, 2017 – 05:54:12
Django version 2.0, using settings ‘mysite.settings’
Starting development server at http://192.168.56.102:8000/
Quit the server with CONTROL-C.
Invalid HTTP_HOST header: ‘192.168.56.102:8000’. You may need to add ‘192.168.56.102’ to ALLOWED_HOSTS.
[11/Dec/2017 05:54:22] “GET / HTTP/1.1” 400 61463
Invalid HTTP_HOST header: ‘192.168.56.102:8000’. You may need to add ‘192.168.56.102’ to ALLOWED_HOSTS.
[11/Dec/2017 05:54:23] “GET /favicon.ico HTTP/1.1” 400 61445
^C
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ vim /home/krishna/DjangoProjects/FirstProject/envib/python3.5/site-packages/django/http/request.py
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py runserver 192.168.56.102:8000 Performing system checks…
System check identified no issues (0 silenced).
You have 14 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.
December 11, 2017 – 05:56:05
Django version 2.0, using settings ‘mysite.settings’
Starting development server at http://192.168.56.102:8000/
Quit the server with CONTROL-C.
[11/Dec/2017 05:56:09] “GET / HTTP/1.1” 200 16559
[11/Dec/2017 05:56:09] “GET /static/admin/css/fonts.css HTTP/1.1” 200 423
[11/Dec/2017 05:56:09] “GET /static/admin/fonts/Roboto-Regular-webfont.woff HTTP/1.1” 200 80304
[11/Dec/2017 05:56:09] “GET /static/admin/fonts/Roboto-Bold-webfont.woff HTTP/1.1” 200 82564
[11/Dec/2017 05:56:09] “GET /static/admin/fonts/Roboto-Light-webfont.woff HTTP/1.1” 200 81348
[11/Dec/2017 05:56:44] “GET /admin HTTP/1.1” 301 0
[11/Dec/2017 05:56:44] “GET /admin/ HTTP/1.1” 302 0
[11/Dec/2017 05:56:44] “GET /admin/login/?next=/admin/ HTTP/1.1” 200 1855
[11/Dec/2017 05:56:44] “GET /static/admin/css/base.css HTTP/1.1” 200 16106
[11/Dec/2017 05:56:44] “GET /static/admin/css/responsive.css HTTP/1.1” 200 17894
[11/Dec/2017 05:56:44] “GET /static/admin/css/login.css HTTP/1.1” 200 1203
[11/Dec/2017 05:57:14] “GET / HTTP/1.1” 200 16559
^C(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ cat polls/admin.py from django.contrib import admin
# Register your models here.
from .models import Question, Choice
admin.site.register(Question)
admin.site.register(Choice)
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ cat polls/models.py
from django.db import models
# Create your models here.
class Question(models.Model):
question_text = models.CharField(max_length=200)
pub_date = models.DateTimeField(‘date published’)
def __str__(self):
return self.question_text
class Choice(models.Model):
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
question = models.ForeignKey(Question, on_delete=models.CASCADE)
def __str__(self):
return self.choice_text
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py makemigrations polls
Migrations for ‘polls’:
polls/migrations/0001_initial.py
– Create model Question
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py makemigrations polls
Migrations for ‘polls’:
polls/migrations/0002_choice.py
– Create model Choice
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, polls, sessions
Running migrations:
Applying contenttypes.0001_initial… OK
Applying auth.0001_initial… OK
Applying admin.0001_initial… OK
Applying admin.0002_logentry_remove_auto_add… OK
Applying contenttypes.0002_remove_content_type_name… OK
Applying auth.0002_alter_permission_name_max_length… OK
Applying auth.0003_alter_user_email_max_length… OK
Applying auth.0004_alter_user_username_opts… OK
Applying auth.0005_alter_user_last_login_null… OK
Applying auth.0006_require_contenttypes_0002… OK
Applying auth.0007_alter_validators_add_error_messages… OK
Applying auth.0008_alter_user_username_max_length… OK
Applying auth.0009_alter_user_last_name_max_length… OK
Applying polls.0001_initial… OK
Applying polls.0002_choice… OK
Applying polls.0003_choice_votes… OK
Applying polls.0004_delete_choice… OK
Applying polls.0005_choice… OK
Applying sessions.0001_initial… OK
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$ python manage.py createsuperuser
Username (leave blank to use ‘krishna’): admin
Email address:
Password:
Password (again):
Superuser created successfully.
(env) krishna@ubuntu:~/DjangoProjects/FirstProject/mysite$