VERY HACKY

def dict_hist_cumsum(hist_, reverse=True):
    """ VERY HACKY """
    import utool as ut
    items = hist_.items()
    if reverse:
        items = sorted(items)[::-1]
    else:
        items = sorted(items)
    key_list = ut.get_list_column(items, 0)
    val_list = ut.get_list_column(items, 1)
    cumhist_ = dict(zip(key_list, np.cumsum(val_list)))
    return cumhist_