Автозакрытие Thread после выполнения

import urllib2
import time
import json
import threading
 
 
BBBBB = open("ddddd.txt", "a")
def scan(aaaaa):
    urlRequest = urllib2.Request("https://xxx=" + aaaaa)
    data = urllib2.urlopen(urlRequest).read()
    json_data = json.loads(data)
    if json_data["result"]>"0":
            BBBBB.write("BBBBB of " + aaaaa + " is " + str(json_data["result"]) + "\n") 
    print ("BBBBB of " + aaaaa + " is " + str(json_data["result"]) + "\n")
 
def main():
    f = open("rass1.txt", "r")
    for line in f:
        t = threading.Thread(target=scan, args=(line,))
        t.daemon = True
        time.sleep(0)
        t.start()
 
if __name__ == '__main__':
    main()

  File "G:\python\lib\threading.py", line 736, in start
    _start_new_thread(self.__bootstrap, ())
thread.error: can't start new thread

import threading
 
 
def function(a,b):
    for i in range(a,b):
        print('{}\n'.format(i))
 
 
def startThread(a,b):
    threading.Thread(target = function, args = (a,b)).start()
 
for i in range(5):
    startThread(i*100,(i+1)*100)

import threading
 
threadArray =[]
def function(a,b):
    for i in range(a,b):
        print('{}\n'.format(i))
 
 
def startThread(a,b):
    threadArray.append(threading.Thread(target = function, args = (a,b)))
    threadArray[-1].start()
 
for i in range(5):
    startThread(i*100,(i+1)*100)

def main():
    f = open("rass1.txt", "r")
    for line in f:
        t = threading.Thread(target=scan, args=(line,))
        t.daemon = True
        time.sleep(0)
        t.start()

def main():
    f = open("rass1.txt", "r")
    for line in f:
        t = threading.Thread(target=scan, args=(line,))
        t.start()

def main():
    f = open("rass1.txt", "r")
    for line in f:
        threadArray.append(threading.Thread(target=scan, args=(line,)))
        threadArray[-1].start()

import urllib2
import time
import json
import threading
n=0
bbbbb = []
 
def scan(aaaaa):
    urlRequest = urllib2.Request("https://xxx" + aaaaa)
    data = urllib2.urlopen(urlRequest).read()
    json_data = json.loads(data)
    print ("bbbbb of " + aaaaa + " is " + str(json_data["result"]) + "\n")
    if json_data["result"]>"0":
            bbbbb.append(aaaaa+" "+str(json_data["result"]))
try:
    f = open("rass1.txt", "r")
    try:
         # read all the lines into a list.
         lines = f.readlines()
    finally:
            f.close()
 
except IOError:
    pass
 
 
for line in lines:
        t = threading.Thread(target=scan, args=(line,))
        t.daemon = True
        time.sleep(0)
        t.start()
        n+=1
 
if len(bbbbb)>"0":
    try:
        logfile = open("bbbbb.txt", "a")
        try:
            for j in bbbbb:
                logfile.write(j)
        finally:
            logfile.close()
     
    except IOError:
        pass

import queue
import threading
import random
import time
 
def thread_function(work_queue):
    while True:
        try:
            value = work_queue.get()
            time.sleep(random.uniform(0.1, 2.5)) # имитация работы
            print(value)
        finally:
            work_queue.task_done()
 
 
def main():
    # "Пул" из 10 потоков
    work_queue = queue.Queue()
    threads = []
    thread_count = 10
    for t in range(thread_count):
        thread = threading.Thread(target=thread_function, args=(work_queue,), daemon=True)
        threads.append(thread)
        thread.start()
 
    # Даем задачи на растерзания потокам
    task_count = 100
    tasks = range(task_count)
    for task in tasks:
        work_queue.put(task)
 
    # Ждем завершения
    work_queue.join()
 
    print("Done!")
 
 
if __name__ == '__main__':
    main()