no module psycopg2

# For quick install
pip install psycopg2-binary

# For production-ready install
pip install psycopg2
# But it will fail if build prerequesties are not met:

Here is what the above code is Doing:
1. Importing the psycopg2 module
2. Creating a connection to the database
3. Creating a cursor object
4. Executing a query
5. Closing the connection