# 数据列表
numbers = [4, 5, 6, 7, 8]
<h1>计算平均值</h1><p>mean = sum(numbers) / len(numbers)</p><h1>初始化平方差之和</h1><p>squared_diff_sum = 0</p>
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                <h1>使用for循环遍历每个数</h1><p>for x in numbers:
squared_diff_sum += (x - mean) ** 2</p><h1>输出结果</h1><p>print("平方差之和为：", squared_diff_sum)</p>

def sum_of_squared_differences(data):
    mean = sum(data) / len(data)
    total = 0
    for value in data:
        total += (value - mean) ** 2
    return total
<h1>调用函数</h1><p>result = sum_of_squared_differences([4, 5, 6, 7, 8])
print("结果：", result)</p>