synthetic.py 文件源码

def __init__(self, constants, dates, sids):
        loaders = {}
        for column, const in iteritems(constants):
            frame = DataFrame(
                const,
                index=dates,
                columns=sids,
                dtype=column.dtype,
            )
            loaders[column] = DataFrameLoader(
                column=column,
                baseline=frame,
                adjustments=None,
            )

        self._loaders = loaders