history_container.py 文件源码

def buffer_panel_minutes(self,
                             buffer_panel,
                             earliest_minute=None,
                             latest_minute=None,
                             raw=False):
        """
        Get the minutes in @buffer_panel between @earliest_minute and
        @latest_minute, inclusive.

        @buffer_panel can be a RollingPanel or a plain Panel.  If a
        RollingPanel is supplied, we call `get_current` to extract a Panel
        object.

        If no value is specified for @earliest_minute, use all the minutes we
        have up until @latest minute.

        If no value for @latest_minute is specified, use all values up until
        the latest minute.
        """
        if isinstance(buffer_panel, RollingPanel):
            buffer_panel = buffer_panel.get_current(start=earliest_minute,
                                                    end=latest_minute,
                                                    raw=raw)
            return buffer_panel
        # Using .ix here rather than .loc because loc requires that the keys
        # are actually in the index, whereas .ix returns all the values between
        # earliest_minute and latest_minute, which is what we want.
        return buffer_panel.ix[:, earliest_minute:latest_minute, :]