Snippet used for a Medium article

main.py

from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return 'Hello, Medium!'

app.run(host='0.0.0.0', port=8000)

test.py

def calc(x, y):
    return x + y

def test_calc():
    assert 5 == calc(2, 3)