用python给出一组数，求总个数、求和、平均值、中位数、方差…

以下是一组数据的例子：

data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

求总个数：

count = len(data)
print("总个数：", count)

求和：

total = sum(data)
print("总和：", total)

求平均值：

average = total / count
print("平均值：", average)

求中位数：

if count % 2 == 0:
median = (data[int(count/2)-1] + data[int(count/2)]) / 2
else:
median = data[int(count/2)]
print("中位数：", median)

求方差：

variance = sum([(x-average)**2 for x in data]) / count
print("方差：", variance)