String parameter to a method choice in python function

Is there a way to pass a string parameter as a choice of a method(). Example below - can it be done in a simpler way instead of repeating the aggregation statements?

def ts_resample(
    df, aggregation="mean", resampling_freq="60S",
):

    ### RESAMPLE ###

    if aggregation == "mean":
        df_r = df.resample(resampling_freq).mean()
    elif aggregation == "median":
        df_r = df.resample(resampling_freq).median()
    elif aggregation == "std":
        df_r = df.resample(resampling_freq).std()

    ### RETURN ###

    return df_r