def listify(df, axis=1):
    """
    Consdense text information across columns into a single list.

    Parameters
    ----------
    df : :class:`pandas.DataFrame`
        Dataframe (or slice of dataframe) to condense along axis.
    axis : :class:`int`
        Axis to condense along.
    """
    return df.copy(deep=True).apply(list, axis=axis)