Project Structure

myproject/
├── manage.py                 # Django's command-line utility
├── myproject/               # Project configuration directory
│   ├── __init__.py
│   ├── settings.py          # Project settings
│   ├── urls.py              # URL declarations
│   ├── asgi.py              # ASGI config
│   └── wsgi.py              # WSGI config
└── apps/                    # Application directory (custom)
    └── blog/                # Example app
        ├── __init__.py
        ├── admin.py         # Admin interface
        ├── apps.py          # App configuration
        ├── models.py        # Database models
        ├── tests.py         # Unit tests
        ├── urls.py          # App URL patterns
        └── views.py         # View functions

# Create a new app
python manage.py startapp blog

# Add app to INSTALLED_APPS in 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 here
]

# Django App Generator
import os
import re

class DjangoAppGenerator:
    def __init__(self, project_root):
        self.project_root = project_root
        self.apps_dir = os.path.join(project_root, 'apps')
        
        # Create apps directory if it doesn't exist
        if not os.path.exists(self.apps_dir):
            os.makedirs(self.apps_dir)
    
    def create_app(self, app_name):
        """Create a new Django app with proper structure"""
        app_path = os.path.join(self.apps_dir, app_name)
        
        if os.path.exists(app_path):
            print(f"App {app_name} already exists!")
            return False
        
        # Create app directory
        os.makedirs(app_path)
        
        # Create __init__.py
        with open(os.path.join(app_path, '__init__.py'), 'w') as f:
            f.write("# Django app initialization\n")
        
        # Create apps.py
        apps_content = f'''from django.apps import AppConfig

class {app_name.capitalize()}Config(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'apps.{app_name}'
    verbose_name = '{app_name.replace("_", " ").title()}'
'''
        with open(os.path.join(app_path, 'apps.py'), 'w') as f:
            f.write(apps_content)
        
        # Create models.py
        models_content = '''from django.db import models

# Define your models here
class ExampleModel(models.Model):
    name = models.CharField(max_length=100)
    description = models.TextField(blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    
    def __str__(self):
        return self.name
    
    class Meta:
        verbose_name = "Example Model"
        verbose_name_plural = "Example Models"
'''
        with open(os.path.join(app_path, 'models.py'), 'w') as f:
            f.write(models_content)
        
        # Create views.py
        views_content = '''from django.shortcuts import render
from django.http import HttpResponse

# Define your views here
def index(request):
    return HttpResponse(f"Welcome to {app_name} app!")

def about(request):
    return HttpResponse(f"This is the about page for {app_name} app.")
'''
        with open(os.path.join(app_path, 'views.py'), 'w') as f:
            f.write(views_content)
        
        # Create urls.py
        urls_content = f'''from django.urls import path
from . import views

app_name = '{app_name}'

urlpatterns = [
    path('', views.index, name='index'),
    path('about/', views.about, name='about'),
]
'''
        with open(os.path.join(app_path, 'urls.py'), 'w') as f:
            f.write(urls_content)
        
        # Create admin.py
        admin_content = f'''from django.contrib import admin
from .models import ExampleModel

@admin.register(ExampleModel)
class ExampleModelAdmin(admin.ModelAdmin):
    list_display = ['name', 'created_at']
    list_filter = ['created_at']
    search_fields = ['name', 'description']
'''
        with open(os.path.join(app_path, 'admin.py'), 'w') as f:
            f.write(admin_content)
        
        # Create tests.py
        tests_content = f'''from django.test import TestCase
from .models import ExampleModel

class {app_name.capitalize()}ModelTests(TestCase):
    def test_example_model_creation(self):
        model = ExampleModel.objects.create(
            name="Test Model",
            description="Test Description"
        )
        self.assertEqual(model.name, "Test Model")
        self.assertEqual(model.description, "Test Description")
'''
        with open(os.path.join(app_path, 'tests.py'), 'w') as f:
            f.write(tests_content)
        
        print(f"App {app_name} created successfully in {app_path}")
        return True

# Usage example
if __name__ == "__main__":
    generator = DjangoAppGenerator(".")
    generator.create_app("blog")
    generator.create_app("users")