class_docstr: refer: https://github.com/xuebinqin/DIS/blob/main/IS-Net/basics.py
class_docstr_tok: ["refer",":","https",":","\/\/github.com\/xuebinqin\/DIS\/blob\/main\/IS-Net\/basics.py"]
code: def __init__(self, threshold: float = 0.5):
      self.precision_cum = None
      self.recall_cum = None
      self.num_cum = None
      self.threshold = threshold
  
imports: from collections import defaultdict, deque
  import datetime
  import time
  import torch
  import torch.distributed
  import torch.nn.functional
  import errno
  import os
label_desc: Use image node_id 1 to create a new F1Score object from inherited base classes: object with example: obj = F1Score(threshold)