#coding=utf-8#!/usr/bin/pythonimport threadimport time# 為線程定義一個(gè)函數(shù)def print_time( threadName, delay):   count = 0   while count < 5:      time.sleep(delay)      count += 1      print "%s: %s" % ( threadName, time.ctime(time.time()) )# 創(chuàng)建兩個(gè)線程try:   thread.start_new_thread( print_time, ("Thread-1", 2, ) )   thread.start_new_thread( print_time, ("Thread-2", 4, ) )except:   print "Error: unable to start thread"while 1:   pass為毛去掉while 1:        pass線程定義的函數(shù) print_time 就不執(zhí)行了呢