import pyodbc

try:
    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')

    cursor = connection.cursor()

    print("select table before updating")

    cursor.execute("select * from tblCustomers")
    while 1:
        row = cursor.fetchone()
        if not row:
            break
        print(row.id, row.code, row.firstName, row.lastName)

    prm_id = 7
    cursor.execute("update tblCustomers set lastName = 'lastName New 7' where id = ?", prm_id)
    connection.commit()

    print("table after updating")
    cursor.execute("select * from tblCustomers")
    while 1:
        row = cursor.fetchone()
        if not row:
            break
        print(row.id, row.code, row.firstName, row.lastName)

    cursor.close()
    connection.close()

except pyodbc.Error as ex:
    print()
    print("exception: ",ex)
    cursor.close()
    connection.close()
    print()
    exit()

print()