i found the way
i solved it by this way
@api.constrains('image_1024')
def check_insert_image_product(self):
if self.image_1024:
file_image = base64.b64decode(self.image_1024)
stream = io.BytesIO(file_image)
img = Image.open(stream)
width, height = img.size
if width > 500 or height > 500:
raise ValidationError(_("You can't insert image with height or width more than 500 (500 x 500).\nHeight: %s \nWidth: %s" % (height, width)))
image_size = sys.getsizeof(file_image) * 0.0009765625
if image_size > 250:
raise ValidationError(_("You can't insert image with size more than 250 KB.\nSize: %s" % (image_size)))
else:
raise UserError(_('You must include a Product Image to be able to save this data.'))