class_docstr: From DETR source: https://github.com/facebookresearch/detr
  (detr/models/matcher.py)
class_docstr_tok: ["From","DETR","source",":","https",":","\/\/github.com\/facebookresearch\/detr","(","detr\/models\/matcher.py",")"]
docstr: Creates the matcher
  Params:
      cost_class: This is the relative weight of the classification error
                  in the matching cost
      cost_bbox:  This is the relative weight of the L1 error
                  of the bounding box coordinates in the matching cost
      cost_giou:  This is the relative weight of the giou loss of the
                  bounding box in the matching cost
docstr_tok: ["Creates","the","matcher","Params",":","cost_class",":","This","is","the","relative","weight","of","the","classification","error","in","the","matching","cost","cost_bbox",":","This","is","the","relative","weight","of","the","L1","error","of","the","bounding","box","coordinates","in","the","matching","cost","cost_giou",":","This","is","the","relative","weight","of","the","giou","loss","of","the","bounding","box","in","the","matching","cost"]
code: def __init__(
      self,
      cost_class: float = 1,
      cost_bbox: float = 1,
      cost_giou: float = 1,
  ):
      """Creates the matcher
      Params:
          cost_class: This is the relative weight of the classification error
                      in the matching cost
          cost_bbox:  This is the relative weight of the L1 error
                      of the bounding box coordinates in the matching cost
          cost_giou:  This is the relative weight of the giou loss of the
                      bounding box in the matching cost
      """
      super().__init__()
      self.cost_class = cost_class
      self.cost_bbox = cost_bbox
      self.cost_giou = cost_giou
      assert (
          cost_class != 0 or cost_bbox != 0 or cost_giou != 0
      ), "all costs cant be 0"
  
imports: from typing import List, Optional, Tuple, Union
  import torch
label_desc: Use image node_id 1 to create a new HungarianMatcher object from inherited base classes: torch.nn with example: obj = HungarianMatcher(cost_class, cost_bbox, cost_giou)