blenderSB delete images from blend if no user or force delete

Remove_unused_images_from_blend.py

#removes images with no users
import bpy

images = bpy.data.images

U = 0
NU = 0

print (10*'-')
print ("total image before", len(bpy.data.images))

for i in images:    
    if not i.users:
        NU += 1
        print (i.name, 'removed')
        images.remove(i) #remove image
    else:
        U += 1

if U == len(bpy.data.images):
    print ("all", U, "image used")

else:    
    print ("total image now", len(bpy.data.images))
    print ("used", U)
    print ("unused deleted", NU)

'''
#forcekill by name
for i in images:
    if i.name.startswith('sauce'):
        i.user_clear() #set user to zero
        i.remove(i) #remove image
'''

'''
#simple version
for i in images:
    if not i.users:
        i.remove(image)
        
'''