code: def __init__(self, size, main_key, crop_keys, p=3 / 8, **kwargs):
      self.size = size
      self.main_key = main_key
      self.crop_keys = crop_keys
      self.p = p
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import numpy
  import cv2
  import random
label_desc: Use image node_id 1 to create a new RandomCropImgMask object from inherited base classes: object with example: obj = RandomCropImgMask(size, main_key, crop_keys, p)