Answers for "python flask default port"

how to change port in flask app

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)

flask python use specified port

if __name__ == '__main__':
      app.run(host='0.0.0.0', port=80)