如何计算根据另一个series分组后的series均值？

fruit = pd.Series(np.random.choice(['apple', 'banana', 'carrot'], 10))
    weights = pd.Series(np.linspace(1, 10, 10))
    
    \# 根据fruit对weight分组
    weightsGrouped = weights.groupby(fruit)
    print(weightsGrouped.indices)

    \# 对分组后series求每个索引的平均值
     weightsGrouped.mean()
    
      #>	{'apple': array([0, 3], dtype=int64), 'banana': array([1, 2, 4, 8],
         dtype=int64), 'carrot': array([5, 6, 7, 9], dtype=int64)}
     #>	apple     2.50
    	banana    4.75
    	carrot    7.75
    	dtype: float64