Python什么都不打印？

Question

只是按照一个教程，据我所知已经完全复制了它，但我的根本不会打印任何东西，它显然应该不断地从每个函数打印，但我似乎没有得到任何返回，不确定为什么 ？

#!/usr/bin/env python

import thread
import time
import random

def runOften(threadName, sleepTime):
    while 1 < 2:
        time.sleep(sleepTime)
        print "%s" %(threadName)

def runLessOften(threadName, sleepTime):
    while 1 < 2:
        time.sleep(sleepTime)
        print "%s" %(threadName)

def runRandomly(threadName, sleepTime):
    while 1 < 2:
        time.sleep(sleepTime)
        print "%s" %(threadName)

try:
    thread.start_new_thread(runOften, ("Often Runs", 2))
    thread.start_new_thread(runLessOften, ("Less Often Runs!", 2))
    thread.start_new_thread(runRandomly, ("Fast and random", random.random()))

except Exception, e:
    print str(e) 

Answer 1

把它放在代码的末尾:

while True:
    pass

您的程序提前终止。

您的“MainThread”中没有任何内容。您产生了 3 个线程，但在所谓的“主程序”中什么都不做。所以 Python 正常终止。

将上面的内容添加到最后，我得到以下输出:

$ python foo.py
Fast and random
Fast and random
Fast and random
Often Runs
 Less Often Runs!
Fast and random
Fast and random
Fast and random
^CTraceback (most recent call last):
  File "foo.py", line 30, in <module>
    while True:
KeyboardInterrupt