Why can't I change the host and port that my Flask app runs on?

Question

I want to change the host and port that my app runs on. I set host and port in app.run, but the flask run command still r

Answer 1

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

if __name__ == '__main__':
    app.run(host="localhost", port=8000, debug=True)

Configure host and port like this in the script and run it with

python app.py