Write a multithreaded program that calculates various statistical values for a l

Question

Write a multithreaded program that calculates various statistical values for a list of numbers. This program will be passed a series of numbers on the command line and will then create three separate worker threads. One thread will determine the average of the numbers, the second will determine the maximum value, and the third will determine the minimum value. For example, suppose your program is passed the integers 90 81 78 95 79 72 85 The program will report The average value is 82 The minimum value is 72 The maximum value is 95 The variables representing the average, minimum, and maximum values will be stored globally. The worker threads will set these values, and the parent thread will output the values once the workers have exited. (We could obviously expand this program by creating additional threads that determine other statistical values, such as median and standard

Explanation / Answer

Python 2.7 code:

import threading

from threading import Thread

import time

def average(mylist):

global Average

Average = sum(mylist)/len(mylist)

def maximum(mylist):

global maxx

maxx = max(mylist)

def minimum(mylist):

global minn

minn = min(mylist)

maxx = 0;

minn = 0;

Average = 0;

mylist = [90,81,78,95,79,72,85]

Thread(target = average, args = [mylist]).start()

Thread(target = maximum,args = [mylist]).start()

Thread(target = minimum,args = [mylist]).start()

print "Maximum = ", maxx

print "Minimum = ", minn

print "Average = ", Average

Sample Output:

Maximum = 95
Minimum = 72
Average = 82

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