Data pulled from SQL comes in brackets

[nickzsche]

Hello, my data from sql comes in brackets. How can I solve this? I just need the string states inside.

 veritabani = sqlite3.connect("Veritabani.db")
        cursor = veritabani.cursor()
        cursor.execute("""SELECT firma FROM sirketler_tablosu """)
        veriler = cursor.fetchall()
        for i in veriler:
            self.ui.cb_Firmalar.addItem(str(i))

My Program and Datas:


Sqlite My Database: