code: def calculate_qparams(self, signed):
      return self._calculate_qparams(signed, self.min_val, self.max_val)
  
file_path: pytorch/torch/ao/quantization/experimental/observer.py
imports: import torch
  import itertools
  import matplotlib.pyplot
  from torch.ao.quantization.observer import ObserverBase
  from torch.ao.quantization.experimental.apot_utils import float_to_apot, apot_to_float
label_desc: Use image node_id 2 for calling the APoTObserver obj's underlying member method code with example usage: obj.calculate_qparams(signed) and returns: self