Question

在线等！求一个python程序：输入或读取一个任意大小的数组，输出这个数组的平均值和标准差！

Answer 1

import math

def avg(arr, n):

    sum=0

    for i in arr:

        sum = sum+i

    return (1.0*sum/n)

def standard_deviation(arr, n):

    a=avg(arr,n)

    value=0;

    for i in arr:

        value=value+(i-a)*(i-a)

    return math.sqrt(1.0*value/n)

print "please input number first"

n=input()

print "please input data then"

arr=[]

for i in range(n):

    data=input()

    arr.append(data)

print "avg:",avg(arr,n)

print "standard deviation:",standard_deviation(arr,n)

Answer 2

def function(inList):
import math
num = len(inList)
sum = 0
for e in inList:
sum = sum + e
average = sum/num
sqrtDiff = 0
for i in inList:
diff = i - average
sqrtAns = pow(diff,2)
sqrtDiff = sqrtAns + sqrtDiff
ans = sqrtDiff / num
answer = math.sqrt(ans)
return (average, answer)

追问

麻烦能不能写出主程序，能形成一个完整的程序。