CalStatistics.py

def getNum(): #获取用户不定长度的输入 nums = [] iNumStr = input("请输入数字(回车退出):") while iNumStr != "": nums.append(eval(iNumStr)) iNumStr = input("请输入数学(回车退出):") return numsdef mean(numbers): #计算平均值 s = 0.0 for num in numbers: s = s + num return s/len(numbers)def dev(numbers, mean): #计算方差 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) #sorted(numbers) size = len(numbers) if size % 2 == 0: med = (numbers[size//2 - 1] + numbers[size//2])/2 else: med = numbers[size//2] return medn = getNum()m = mean(n)print("平均值:{},方差:{:.2},中位数:{}.".format(m, dev(n,m), median(n)))

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