# -*- coding: utf-8 -*-

from flask import Flask
app = Flask(__name__)

@app.route('/')
def index():
    return 'OK!'

if __name__ == '__main__':
    app.run()

# -*- coding: utf-8 -*-

from flask import Flask
app = Flask(__name__)


@app.route('/')
def index():
    return 'OK!'

if __name__ == '__main__':
    app.run()

add whitespace