How can i display image from mysql to python gui ?

I am trying , like this :

from tkinter import *
from io import BytesIO
window= Tk()
db=MySQLdb.connect("localhost","root","??","??")
cursor=db.cursor()
sql= "SELECT LOGO FROM SYSTEMDETAILS" cursor.execute(sql)
logo=cursor.fetchone()
img = Image.open(BytesIO(logo))
phimg = ImageTk.PhotoImage(img)
panel = Label(window, image = phimg)
panel.pack()

When i run this, it show error in line 9 , it want logo as an object but in here its tuple

從提供的 MySQLdb 連線、SELECT LOGO 查詢、cursor.fetchone() 以及回報的第 9 行附近的 Image.open(BytesIO(logo)) 呼叫開始。執行程式片段並檢查 fetchone() 傳回的值；當取得的 logo 被影像載入路徑接受並顯示在 Tkinter 視窗中時，即表示完成。