Python Frameworks

Python Frameworks Roadmap

Pick one framework, then follow the same steps: install -> hello world -> routing -> data layer -> auth -> testing -> deployment.

Web appsAPIsAsync
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Framework

Django Full-stack

Django is "batteries included": ORM, migrations, admin, templates, auth, and strong security defaults.

⚙️
From scratch (setup)
  • 1 Create virtual env, then pip install django.
  • 2 Start project: django-admin startproject config .
  • 3 Start app: python manage.py startapp app
  • 4 Run: python manage.py runserver
# urls.py
+from django.urls import path
+from . import views
+
+urlpatterns = [
+  path("", views.home),
+]
🧩
Advanced checklist
  • 1 ORM performance: select_related/prefetch_related.
  • 2 Security: CSRF, XSS escaping, permissions, rate limits.
  • 3 Deployment: Gunicorn + Nginx, static/media, env settings.
Framework

Flask Lightweight

Flask is minimal. You compose your stack using extensions (DB, auth, migrations, validation).

🚀
Hello World
  • 1 Install: pip install flask
  • 2 Create route and run dev server.
from flask import Flask
+
+app = Flask(__name__)
+
+@app.get("/")
+def home():
+    return {"ok": True}
Use the app factory + blueprints for larger projects.
Framework

FastAPI Modern APIs

FastAPI uses type hints for validation and auto-generates OpenAPI docs. Great for async APIs.

📝
From scratch (setup)
  • 1 Install: pip install fastapi uvicorn
  • 2 Run: uvicorn main:app --reload
  • 3 Open docs: /docs
from fastapi import FastAPI
+app = FastAPI()
+
+@app.get("/health")
+def health():
+    return {"status": "ok"}
Framework

Pyramid Flexible

Pyramid scales from small apps to large systems with explicit configuration and a pluggable design.

🤖
When to use
  • 1 You want explicit configuration instead of "magic".
  • 2 You need fine-grained security policies.
Framework

Tornado High-performance

Tornado is async-first and great for WebSockets and long-lived connections.

Advanced tips
  • 1 Avoid blocking calls in the event loop.
  • 2 Add observability: timeouts, metrics, structured logs.