import mysql.connector
from mysql.connector import errorcode

try:
    cnn = mysql.connector.connect(
        user='root',
        password='',
        host='localhost',
        database='vuelos')
    print("It Works!!")
except mysql.connector.Error as e:
    if e.errno == errorcode.ER_ACCES_DENIED_ERROR:
        print("Something is wrong with username or Password")
    elif e.errno== errorcode.ER_ACCES_DENIED_ERROR:
        print("Database dont exist")
    else:
        print(e)

cursor = cnn.cursor()

cursor.execute("INSERT INTO `clientes` (`id`, `DNI`, `Nombre`) VALUES (NULL, '123456', 'peter')")
cnn.commit()
cursor.close()
cnn.close()