algorithm.py 文件源码

def set_symbol_lookup_date(self, dt):
        """
        Set the date for which symbols will be resolved to their sids
        (symbols may map to different firms or underlying assets at
        different times)
        """
        try:
            self._symbol_lookup_date = pd.Timestamp(dt, tz='UTC')
        except ValueError:
            raise UnsupportedDatetimeFormat(input=dt,
                                            method='set_symbol_lookup_date')