code: def __init__(self):
      super(WriterStringIO, self).__init__()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import collections
  import io
  import itertools
  import sys
  import backtrader
  from backtrader.utils.py3 import map, with_metaclass, string_types, integer_types
label_desc: Use image node_id 1 to create a new WriterStringIO object from inherited base classes: WriterFile with example: obj = WriterStringIO()