如何将嵌套字典中列表的和重新添加到字典中

def calculate_sum(dictionary):
    for key, value in dictionary.items():
        if isinstance(value, list):
            # 计算列表中所有元素的和
            total_sum = sum(value)
            # 将键和新的值重新添加到字典中
            dictionary[key] = total_sum
    return dictionary

# 示例嵌套字典
nested_dict = {
    'key1': [1, 2, 3],
    'key2': 'value2',
    'key3': [4, 5, 6]
}

# 调用函数计算和并重新添加到字典中
result_dict = calculate_sum(nested_dict)
print(result_dict)

{'key1': 6, 'key2': 'value2', 'key3': 15}