Frameworks

Flask Cheat Sheet

Print-ready cheat sheet for Flask, organized for fast lookup, study, and desk-side use

Source: Flask Documentation (flask.palletsprojects.com)
License: MIT
Variants: 3 download options
Updated: 2026-03-27

Sample

What's in this cheat sheet

Minimal App

from flask import Flask
app = Flask(__name__)

@app.route('/')
def index():
    return 'Hello, World!'

Run the App

pip install flask
flask --app app run --debug
# or: python -m flask run --debug

Project Structure

`app.py`	Application entry point
`templates/`	Jinja2 HTML templates
`static/`	CSS, JS, images
`models.py`	Database models
`requirements.txt`	Python dependencies

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