After Connecting, you can execute a SQL statement and retrieve the results.

SELECT Procedure

You will need to obtain a cursor before executing any SQL. Once you have one, you can use the cursor's execute method.

cursor = cnxn.cursor()
cursor.execute("SELECT ShipName, ShipCity FROM \"postgres\".\"public\".Orders WHERE ShipCountry = 'USA'")

Iterating over the Results

You can use a for loop to iterate over the rows of the resultset. Each row is presented as a tuple containing column values:

for (ShipName, ShipCity) in cursor:
    print("ShipName = {}, ShipCity = {}".format(ShipName, ShipCity))