Set the background with the ctypes in the python

i want to change the background with the (ctypes) in the python and i use this code :

import ctypes

a = input(">>>>")
if a == 'image':
    address = input("Insert your image >>>>")
    ctypes.windll.user32.SystemParametersInfoW(20, 0, address, 10)


but when i insert the address of the image the background become black (

the address is correct because i use this code and it works :

address  = "C:\Users\IIIIIIII  A  IIIIIII\Desktop\IMG_20180224_081321_180.jpg"

ctypes.windll.user32.SystemParametersInfoW(20,0,address ,10)


What should I do to be able to change the background with the first code.