import numba

@numba.njit
def sum_func(index, values):
    return pd.Series(np.sum(values), index=index)

df_long_control[['user_id', 'reward_type', 'reward']].groupby(['user_id', 'reward_type'], as_index=False).apply(sum_func, engine='numba')

I’m trying to group by user_id and reward_type and apply sum function using numba, but got an error

TypeError: sum_func() got an unexpected keyword argument 'engine'