博客

def getNum():

nums=[]

iNumStr=input(“请输入数字（回车退出）：”)

while iNumStr!=””:

nums.append(eval(iNumStr))

iNumStr=input(“请输入数字（回车退出）：”)

return nums

def mean(numbers):

s=0.0

for num in numbers:

s=s+num

return s/len(numbers)

def dev(numbers,mean):

sdev=0.0

for num in numbers:

sdev=sdev+(num-mean)**2

return pow(sdev/(len(numbers)-1),0.5)

def median(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 med

n=getNum()

m=mean(n)

print(“平均值:{},方差:{:.2},中位数:{}.”.format(m,dev(n,m),median(n)))