class_docstr: Displays a progress bar.
      It refers to https://github.com/keras-team/keras/blob/keras-2/keras/utils/generic_utils.py
  
  Args:
      target (int): Total number of steps expected, None if unknown.
      width (int): Progress bar width on screen.
      verbose (int): Verbosity mode, 0 (silent), 1 (verbose), 2 (semi-verbose)
      stateful_metrics (list|tuple): Iterable of string names of metrics that should *not* be
          averaged over time. Metrics in this list will be displayed as-is. All
          others will be averaged by the progbar before display.
      interval (float): Minimum visual progress update interval (in seconds).
      unit_name (str): Display name for step counts (usually "step" or "sample").
code: def add(self, n, values=None):
      self.update(self._seen_so_far + n, values)
  
file_path: PaddleSeg/paddleseg/utils/progbar.py
imports: import os
  import sys
  import time
  import numpy
label_desc: Use image node_id 3 for calling the Progbar obj's underlying member method code with example usage: obj.add(n, values) without return types