class_docstr: Singleton class wrapping an ibpy ibConnection instance.
  
  The parameters can also be specified in the classes which use this store,
  like ``VCData`` and ``VCBroker``
class_docstr_tok: ["Singleton","class","wrapping","an","ibpy","ibConnection","instance",".","The","parameters","can","also","be","specified","in","the","classes","which","use","this","store",",","like","``","VCData","``","and","``","VCBroker","``"]
code: def _t_rtdata(self, data, symbol):
      self.comtypes.CoInitialize()  # running in another thread
      vcrt = self.CreateObject(self.vcrtmod.RealTime)
      conn = self.GetEvents(vcrt, data)
      data._vcrt = vcrt
      vcrt.RequestSymbolFeed(symbol, False)  # no limits
      PumpEvents()
      del conn  # ensure events go away
      self.comtypes.CoUninitialize()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import collections
  from datetime import date, datetime, time, timedelta
  import os.path
  import threading
  import time
  import ctypes
  from backtrader import TimeFrame, Position
  from backtrader.feed import DataBase
  from backtrader.metabase import MetaParams
  from backtrader.utils.py3 import MAXINT, range, queue, string_types, with_metaclass
  from backtrader.utils import AutoDict
label_desc: Use image node_id 18 for calling the VCStore obj's underlying member method code with example usage: obj._t_rtdata(data, symbol) without return types