Flask 3 · Setup and CLI
Hello world app
The smallest Flask application, saved as app.py.
from flask import Flask
app = Flask(__name__)
@app.get("/")
def index():
return "Hello, World!"
Official Flask 3 documentation
Flask 3 · Setup and CLI
The smallest Flask application, saved as app.py.
from flask import Flask
app = Flask(__name__)
@app.get("/")
def index():
return "Hello, World!"
Official Flask 3 documentation
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