from flask import Flask, render_template
app = Flask(__name__)

@app.route("/")
def hello():
	return render_template('index.html')

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

from flask import Flask, render_template
MyApp = Flask(__name__)

@MyApp.route("/")
def hello():
	return render_template('index.html')

if __name__ == "__main__":
	MyApp.run()

Work in progress