create virtual environment python flask code example

Example 1: import flask

from flask import Flask
app = Flask(__name__)

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

Example 2: flask activ environment

. venv/bin/activate

Example 3: how to import flask

from flask import Flask

app = Flask(__name__)

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

Example 4: flask activ environment

py -3 -m venv venv