code: def prompt(self, msg, default=None):
      try:
          if default:
              msg = msg + "[" + str(default) + "]"
          msg = msg + ": "
          result = input(msg)
          return result if result else default
      except EOFError:
          return default
  
imports: from __future__ import print_function
  from future import standard_library
  from builtins import input
  import os
  import sys
  import importlib
  import inspect
  import prettytable
  from io import open
  from datmo.core.util.i18n import get
  from datmo.core.util.exceptions import ArgumentError, ProjectNotInitialized
  from datmo.core.util.misc_functions import check_docker_inactive
label_desc: Use image node_id 4 for calling the Helper obj's underlying member method code with example usage: obj.prompt(msg, default) and returns: unknown, default