[技术交流] 自定义函数计算基本统计值

def getNum():  # 获取用户不定长度的输入
    num = list(eval(input()))
    return num


def mean(numbers):  # 计算平均值
    sum = 0
    for each in numbers:
        sum += each
    return sum / len(numbers)


def dev(numbers, mean):  # 计算标准差
    sdev = 0.0
    for num in numbers:
        sdev = sdev + (num - mean) ** 2
    return pow(sdev / (len(numbers) - 1), 0.5)


def median(numbers):  # 计算中位数
    numbers = sorted(numbers)
    if len(numbers) % 2 == 0:
        med = (numbers[len(numbers) // 2 - 1] + numbers[len(numbers) // 2]) / 2
    else:
        med = numbers[len(numbers) // 2]
    return med
n =  getNum()  # 主体函数
m = mean(n)
print("平均值:{:.2f},标准差:{:.2f},中位数:{}".format(m, dev(n, m), median(n)))