How to run a thread in the background in python

Question

 class CORSRequestHandler (SimpleHTTPRequestHandler): def do_GET(self): thread1 = threading.Thread(target=test()) thread1.daemon = True thread1.start() return SimpleHTTPRequestHandler.do_GET(self) def test(): while True: print "Hello" time.sleep(2) if __name__ == '__main__': BaseHTTPServer.test(CORSRequestHandler, BaseHTTPServer.HTTPServer) 

I need to run a server meanwhile printing Hello in the background. Can you please tell me what i am doing wrong because if a try to enter the url the page never loads up. However Hello is being printed and the server does start.

Answer 1

You need to pass method test in target keyword argument of threading.Thread , not what test returns. So, replace

thread1 = threading.Thread(target=test())

with

thread1 = threading.Thread(target=test)

When you do target=test() test method is called right then, hence the infinite loop and the request never returns.