How to Serve Up Mobile and Desktop Versions of Your Website in Python with Flask

mobile_friendly_flask_app.py

from flask import Flask, Response, render_template, request

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def index():

    user_agent = request.headers.get('User-Agent')
    user_agent = user_agent.lower()

    # In your templates directory, create a mobile version of your site (mobile.index.html).
    # Likewise, add your desired desktop template as well (desktop.index.html).

    if "iphone" in user_agent:
        return render_template('mobile.index.html')
    elif "android" in user_agent:
        return render_template('mobile.index.html')
    else:
        return render_template('desktop.index.html')