class_docstr: This class can be applied to a data source as a filter and will filter out
  intraday bars which fall outside of the regular session times (ie: pre/post
  market data)
  
  This is a "simple" filter and must NOT manage the stack of the data (passed
  during init and __call__)
  
  It needs no "last" method because it has nothing to deliver
  
  Bar Management will be done by the SimpleFilterWrapper class made which is
  added durint the DataBase.addfilter_simple call
class_docstr_tok: ["This","class","can","be","applied","to","a","data","source","as","a","filter","and","will","filter","out","intraday","bars","which","fall","outside","of","the","regular","session","times","(","ie",":","pre\/post","market","data",")","This","is","a","``","simple","''","filter","and","must","NOT","manage","the","stack","of","the","data","(","passed","during","init","and","__call__",")","It","needs","no","``","last","''","method","because","it","has","nothing","to","deliver","Bar","Management","will","be","done","by","the","SimpleFilterWrapper","class","made","which","is","added","durint","the","DataBase.addfilter_simple","call"]
code: def __init__(self, data):
      pass
  
file_path: backtrader/backtrader/filters/session.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from datetime import datetime, timedelta
  from backtrader import TimeFrame
  from backtrader.utils.py3 import with_metaclass
  from ..None import metabase
label_desc: Use image node_id 1 to create a new SessionFilterSimple object from inherited base classes:  with example: obj = SessionFilterSimple(data)