PyQT5. Работа с базой данных

from PyQt5 import QtWidgets, QtSql
import sys
 
app=QtWidgets.QApplication(sys.argv)
 
db=QtSql.QSqlDatabase.addDatabase("QPSQL")
#db=QtSql.QSqlDatabase.addDatabase("QODBC")
 
db.setHostName("10.*.*.*")
db.setPort(5432)
db.setDatabaseName("test")
db.setUserName("postgres")
db.setPassword("****")
#db.setConnectOptions("requiressl=0")
 
#db.setDatabaseName('Driver={PostgreSQL ODBC Driver(UNICODE)};Server=10.*.*.*;Port=5432;Database=test;UID=postgres;PWD=****')
#db.setDatabaseName('DRIVER={PostgreSQL Unicode};Server=10.*.*.*;Port=5432;Database=test;UID=postgres;PWD=****')
 
if db.isOpen():
            db.close()
 
if db.open():
    print("Connection Success")
else:
    print("Something wrong")
 
db.close()

import psycopg2
import psycopg2.extras
import sys
 
def main():
    conn_string = "host='10.*.*.*' dbname='test' user='postgres' password='****'"
    
    conn = psycopg2.connect(conn_string)
 
    cursor = conn.cursor('cursor_unique_name', cursor_factory=psycopg2.extras.DictCursor)
    cursor.execute('SELECT * FROM "tst"')
 
    i = 0
    for row in cursor:
        i += 1
        print ("row: %s    %s\n" % (i, row))
 
if __name__ == "__main__":
    main()

if db.open():
    print("Connection Success")
else:
    print("Something wrong")