deprecated-decorator-flask

A Flask decorator to mark pages as deprecated with visual warnings and HTTP headers.

Installation

pip install deprecated-decorator-flask

Usage

from flask import Flask
from deprecated_decorator_flask import deprecated

app = Flask(__name__)

# Basic usage
@app.route('/old-page')
@deprecated
def old_page():
    return "<html><body><h1>Old Page</h1></body></html>"

# With custom message
@app.route('/old-page2')
@deprecated(message="Use /new-page instead.")
def old_page2():
    return "<html><body><h1>Old Page 2</h1></body></html>"

# With sunset date
@app.route('/old-page3')
@deprecated(message="Use /new-page instead.", sunset="2025-09-01")
def old_page3():
    return "<html><body><h1>Old Page 3</h1></body></html>"

Features

• Visual Warning: Adds a blinking red border around the page and a sticky warning banner
• HTTP Headers: Adds Deprecation, X-Deprecated-Message, and Sunset headers
• Metadata: Decorated functions get _deprecated, _deprecated_message, and _deprecated_sunset attributes

License

MIT