position_tracker.py 文件源码

def __setstate__(self, state):
        OLDEST_SUPPORTED_STATE = 3
        version = state.pop(VERSION_LABEL)

        if version < OLDEST_SUPPORTED_STATE:
            raise BaseException("PositionTracker saved state is too old.")

        self.asset_finder = state['asset_finder']
        self.positions = positiondict()
        # note that positions_store is temporary and gets regened from
        # .positions
        self._positions_store = zp.Positions()

        self._unpaid_dividends = state['unpaid_dividends']

        # Arrays for quick calculations of positions value
        self._position_value_multipliers = OrderedDict()
        self._position_exposure_multipliers = OrderedDict()

        # Update positions is called without a finder
        self.update_positions(state['positions'])