Sources:flask.pocoo
#Sample application: app.py
from flask import Flask
app=Flask(__name__)
@app.route("/")
def hello():
return "Hello World"
if __name__=='__main__':
app.run(debug=True, host='0.0.0.0', port=8081) #default host is 127.0.0.1 and port 5000(if not provided).
#To Run Sample app.py
python app.py #This starts webapp at port 8081.