import time
start = True
while start == True: print 1; time.sleep(1)

 # thread_demo.py
from threading import Thread, Event
from collections import namedtuple, defaultdict
import time
    
ThreadInfo = namedtuple('ThreadInfo', 'thread, stop_event')
    
def counter(n=100, interval=5, stop_event=None):
    while n > 0 and (stop_event is None or not stop_event.is_set()):
        print(n, 'left')
        n -= 1
        time.sleep(interval)
    
def create_manager():
    threads = defaultdict(lambda: None)
    funcs = defaultdict(lambda: None)
    funcs['counter'] = counter
    def thread_manager(thread_id, thread_type=None, command='start', **kwargs):
        thread_info = threads[thread_id]
        if thread_info is None and thread_type is not None and command == 'start':
            func = funcs[thread_type]
            if func is not None:
                stop_event = Event()
                kwargs['stop_event'] = stop_event
                thread = Thread(target=func, name=thread_id, kwargs=kwargs)
                threads[thread_id] = ThreadInfo(thread, stop_event)
                thread.start()
        elif thread_info is not None and command == 'kill':
            del(threads[thread_id])
            thread_info.stop_event.set()
    return thread_manager

 >>> import thread_demo
>>> tm = thread_demo.create_manager()
>>> tm('c1', 'counter', n=20, interval=5)
>>> tm('c2', 'counter', n=10, interval=10)
>>> tm('c3', 'counter', n=42, interval=3)
>>> tm('c2', command='kill')
>>> tm('c3', command='kill')
>>> tm('c1', command='kill')