在一列中组合具有相同值的行，并找出这些行的平均值

def find_average(rows):
    # 创建一个字典，用于存储相同值的行
    row_dict = {}

    # 遍历该列，将相同值的行组合在一起
    for row in rows:
        value = row[column_index]  # 假设column_index是要处理的列的索引
        if value in row_dict:
            row_dict[value].append(row)
        else:
            row_dict[value] = [row]

    # 计算每个组合的平均值
    averages = []
    for value, rows in row_dict.items():
        total = sum(row[column_index] for row in rows)
        average = total / len(rows)
        averages.append(average)

    return averages