Redirecting to URL in Flask

I’m new to Python and Flask and I’m trying to do the equivalent of Response.redirect as in C# – ie: redirect to a specific URL – how do I go about this?

Here is my code:

import os
from flask import Flask

app = Flask(__name__)

@app.route("https://stackoverflow.com/")
def hello():
    return 'Hello World!'

if __name__ == '__main__':
    # Bind to PORT if defined, otherwise default to 5000.
    port = int(os.environ.get('PORT', 5000))
    app.run(host="0.0.0.0", port=port)