python program to Find Resolution of JPEG Image

num = int(input("Enter a number: "))   def jpeg_res(filename):     with open(filename,'rb') as img_file:         img_file.seek(163)         a = img_file.read(2)         height = (a[0] << 8) + a[1]         a = img_file.read(2)         width = (a[0] << 8) + a[1]     print("The resolution of the image is",width,"x",height)  jpeg_res("img1.jpg")