class_docstr: Display progress bar using rich.
class_docstr_tok: ["Display","progress","bar","using","rich","."]
code: def __enter__(self):
      self.progress.start()
      return self
  
imports: from __future__ import annotations
  from typing import Protocol
  from rich.console import Console
  from rich.progress import BarColumn, MofNCompleteColumn, Progress, TaskProgressColumn, TextColumn, TimeRemainingColumn
  from rich.table import Column
label_desc: Use image node_id 2 for calling the RichProgressBar obj's underlying member method code with example usage: obj.__enter__() and returns: self