How to start python flask app?

Flask - Interview Questions

A simple Flask application looks like below

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

You can start the python flask app by running the below command

$ export FLASK_APP=hello.py
$ flask run
 * Running on http://127.0.0.1:5000/

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