code: def __init__(self, price, quantity):
      self.__price = price
      self.__quantity = quantity
  
imports: import abc
  import six
  from pyalgotrade import broker
  import pyalgotrade.bar
  from .None import slippage
label_desc: Use image node_id 1 to create a new FillInfo object from inherited base classes: object with example: obj = FillInfo(price, quantity)