Web application development with Flask

$ pip install flask

Creating a minimal app

app.py


from flask import Flask
app = Flask(__name__)

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

I'm importing the Flask class from the flask package with from flask import Flask. You can set the route as you like with @ app.route ("/ ").

Run

$ export FLASK_APP=app.py
$ flask run

reference

Web application development "first step" with VS Code and Flask

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