code: def __init__(self, windowSize):
      super(ROCEventWindow, self).__init__(windowSize)
  
file_path: pyalgotrade/pyalgotrade/technical/roc.py
imports: from pyalgotrade import technical
label_desc: Use image node_id 1 to create a new ROCEventWindow object from inherited base classes: technical with example: obj = ROCEventWindow(windowSize)