code: def __init__(self, num_classes=80, mask_resolution=14):
      super(MaskAssigner, self).__init__()
      self.num_classes = num_classes
      self.mask_resolution = mask_resolution
  
imports: import sys
  import paddle
  from ppdet.core.workspace import register, serializable
  from .target import rpn_anchor_target, generate_proposal_target, generate_mask_target, libra_generate_proposal_target
  import numpy
label_desc: Use image node_id 1 to create a new MaskAssigner object from inherited base classes: object with example: obj = MaskAssigner(num_classes, mask_resolution)