code: def __init__(self, iterable):
      self.bar = st.progress(0, text="Running perturbations")
      self.iterable = iterable
      self.total = len(iterable)
      self.progress = 0
      self._iter = iter(self.iterable)
  
file_path: interpret-text/python/interpret_text/generative/model_lib/streamlit_frontend.py
imports: import streamlit
  import numpy
label_desc: Use image node_id 1 to create a new ProgressBar object  with example: obj = ProgressBar(iterable)