from threading import Thread

n = 5

def foobar():
    print('foobar')

def threads(n):
    for n in range(n):
        yield Thread(target=foobar)

thread_list = list()

for thread in threads(n):
    thread_list.append(thread)

for thread in thread_list:
    thread.start()

for thread in thread_list:
    thread.join()