class_docstr: Wrapper class to call csvdir_bundle with provided
  list of time frames and a path to the csvdir directory
code: def __init__(self, tframes=None, csvdir=None):
      self.tframes = tframes
      self.csvdir = csvdir
  
file_path: zipline/zipline/data/bundles/csvdir.py
imports: import os
  import sys
  from logbook import Logger, StreamHandler
  from numpy import empty
  from pandas import DataFrame, read_csv, Index, Timedelta, NaT
  from trading_calendars import register_calendar_alias
  from zipline.utils.cli import maybe_show_progress
  from .None import core
label_desc: Use image node_id 1 to create a new CSVDIRBundle object  with example: obj = CSVDIRBundle(tframes, csvdir)