Python 多线程运行，可是为什么是Thread-2先执行

Question

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import thread
import time

def print_time(threadName, delay, count):
    print "%s: %s  %s \n" % (threadName, time.ctime(time.time()), str(count))
    count = count
    while count < 5:
        time.sleep(delay)
        count += 1
        print "%s: %s  %s" % (threadName, time.ctime(time.time()), str(count))
try:
    thread.start_new_thread(print_time, ("Thread-1", 1, 0))
    thread.start_new_thread(print_time, ("Thread-2", 3, 0))
except:
    print "Error: unable to start thread"
while 1:
    pass

运行结果：

Answer 1

随机的，但是python不推荐thread模块，建议用threading

Answer 2

这是随机的，只是你恰巧碰到 Thread 2 先打印

Answer 3

执行时机取决于操作系统调度，并不是先开始就先执行

Answer 4

随机的 而且就算先开始的线程也不一定会先打印