Django Setup and Apps

python manage.py startapp blog

# mysite/settings.py
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',  # add your app
]

blog/
├── __init__.py
├── admin.py          # Admin configuration
├── apps.py           # App configuration
├── models.py         # Database models
├── views.py          # View functions
├── urls.py           # URL patterns (create this)
├── tests.py          # Tests
└── migrations/        # Database migrations

# blog/urls.py (create this file)
from django.urls import path
from . import views

urlpatterns = [
    path('', views.post_list, name='post_list'),
    path('post/<int:pk>/', views.post_detail, name='post_detail'),
]

# mysite/urls.py
from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('blog.urls')),
]

python manage.py runserver              # Start dev server
python manage.py makemigrations         # Create migrations
python manage.py migrate               # Apply migrations
python manage.py createsuperuser       # Create admin user
python manage.py shell                 # Interactive shell
python manage.py test                  # Run tests
python manage.py startapp appname      # Create new app