code: def onEnterCanceled(self, position):
      self.__position = None
  
file_path: pyalgotrade/samples/tutorial-4.py
imports: from __future__ import print_function
  from pyalgotrade import strategy
  from pyalgotrade.barfeed import quandlfeed
  from pyalgotrade.technical import ma
label_desc: Use image node_id 3 for calling the MyStrategy obj's underlying member method code with example usage: obj.onEnterCanceled(position) without return types