class_docstr: Track a series of values and provide access to smoothed values over a
  window or the global series average.
class_docstr_tok: ["Track","a","series","of","values","and","provide","access","to","smoothed","values","over","a","window","or","the","global","series","average","."]
code: def add_value(self, value):
      self.deque.append(value)
  
file_path: PaddleOCR/ppocr/utils/stats.py
imports: import collections
  import numpy
  import datetime
label_desc: Use image node_id 2 for calling the SmoothedValue obj's underlying member method code with example usage: obj.add_value(value) without return types