多维数组的数值均值

def calculate_average(arr):
    total = 0
    count = 0
    for row in arr:
        for num in row:
            total += num
            count += 1
    if count > 0:
        average = total / count
        return average
    else:
        return None

# 示例二维数组
array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

# 计算均值
result = calculate_average(array)
print("多维数组的数值均值为:", result)