class_docstr: Run length encoding of a mask.
  
  Don't instantiate this class directly, instead use the classmethods
  `from_coco` and `from_kaggle`.
code: def __init__(self, counts: List[int]):
      self.counts = counts
  
imports: from icevision.imports import *
  from icevision.utils import *
  from PIL import Image
label_desc: Use image node_id 1 to create a new RLE object from inherited base classes: Mask with example: obj = RLE(counts)