class_docstr: Get Norfair detections from MOTChallenge text files containing detections
class_docstr_tok: ["Get","Norfair","detections","from","MOTChallenge","text","files","containing","detections"]
code: def __iter__(self):
      self.frame_number = 1
      return self
  
imports: import os
  import numpy
  from rich import print
  from rich.progress import track
  from norfair import Detection
  from collections import OrderedDict
label_desc: Use image node_id 3 for calling the DetectionFileParser obj's underlying member method code with example usage: obj.__iter__() and returns: self