Question

I have the following block of code that is part of a larger program. I am trying to get it to print the execution time once all of the threads are closed but can’t seem to get it to work. Any ideas?

import time
import csv
import threading 
import urllib.request


def openSP500file():
    SP500 = reader(open(r'C:\Users\test\Desktop\SP500.csv', 'r'), delimiter=',')
    for x in SP500:
        indStk = x[0]
        t1 = StockData(indStk)
        t1.start()

    if not t1.isAlive():
        print(time.clock()-start_time, 'seconds')
    else:
        pass

def main():
    openSP500file()


if __name__ == '__main__':
    start_time = time.clock()
    main()

Thanks!

Answer 1

You aren’t waiting for all the threads to finish (only the last one created). Perhaps something like this in your thread-spawning loop?

threads = []
for x in SP500:
    t1 = StockData(x[0])
    t1.start()
    threads.append(t1)
for t in threads:
    t.join()
... print running time