Test how many threads we can run at once

thread_test.py

"""Test how many threads we can run at once."""

import itertools
import threading
import time
import sys

import requests


successes = itertools.count()
failures = itertools.count()


def thread_func():
    while True:
        time.sleep(0.5)
        try:
            requests.get('http://www.example.com').text
            next(successes)
        except:
            next(failures)


def main(n):
    threading.stack_size(64 * 1024)

    for i in range(n):
        thread = threading.Thread(target=thread_func)
        thread.start()
        time.sleep(0.005)

    n = 0
    while True:
        time.sleep(1)
        print(next(successes) - n, next(failures) - n)
        n += 1


if __name__ == '__main__':
    main(int(sys.argv[1]))