history_container.py 文件源码

def fast_append_date_to_index(index, timestamp):
    """
    Append a timestamp to a DatetimeIndex.  DatetimeIndex.append does not
    appear to work.
    """
    return pd.DatetimeIndex(
        np.hstack(
            [
                index.values,
                [timestamp.asm8],
            ]
        ),
        tz='UTC',
    )