Yes Samhita, thanks… But how are these two related ones to the code for the article, this is the requirements.txt
https://github.com/samhita-alla/flask-chat-app-article/blob/master/requirements.txt
Flask==0.12.2
flask-socketioeventlet==0.17.4
gunicorn==18.0.0
flask-sqlalchemy
psycopg2
The last two lines are also importing the described package that I think are not used for this example. Am I wrong?