code: def __call__(self, i):
      if i < self.start_iter:
          return self.start_value
      if i >= self.end_iter:
          return self.end_value
      part = (i - self.start_iter) / (self.end_iter - self.start_iter)
      return self.start_value * (1 - part) + self.end_value * part
  
imports: import math
  import random
  import hashlib
  import logging
  from enum import Enum
  import cv2
  import numpy
label_desc: Use image node_id 2 for calling the LinearRamp obj's underlying member method code with example usage: obj.__call__(i) and returns: unknown, self, self