python多线程，执行第10个时退出了，为啥啊？

2018-07-05 03:32:21 407 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Python多线程编程：主线程退出时如何优雅结束子线程在多线程编程中，线程生命周期管理是核心概念之一，它决定了程序如何协调不同执行流的开始与结束。其原理在于操作系统或语言运行时对线程调度和资源分配的控制机制。正确的线程管理技术价值在于确保程序资源高效利用、避免内存泄漏，并实现可控的优雅退出。这在数据抓取、后台服务、GUI应用等需要并发处理但需及时释放资源的场景中尤为重要。针对Python中主线程退出后子线程仍在运行的问题，本文深入探讨了守护线程与threading.Event等同步机制，通过守护线程实现自动终止，或利用事件通知实现协作式优雅退出，为开发者提供从阅读详情

import threading
import time
def tpppppp(qqq):
print (threading.current_thread().name,threading.activeCount(),qqq)
time.sleep(1)
pppp=0
print (type(pppp))
print (threading.current_thread().getName())
while 1:
if threading.activeCount() <= 4:
pppp += 1
tt=threading.Thread(target = tpppppp,args = (str(pppp)))
tt.setDaemon(True)
tt.start()
tt.join()

=====输出如下，第10个就退出了=============
MainThread
Thread-1 2 1
Thread-2 2 2
Thread-3 2 3
Thread-4 2 4
Thread-5 2 5
Thread-6 2 6
Thread-7 2 7
Thread-8 2 8
Thread-9 2 9
Exception in thread Thread-10:
Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
self.run()
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
TypeError: tpppppp() takes 1 positional argument but 2 were given

Exception in thread Thread-11:
Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
self.run()
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
TypeError: tpppppp() takes 1 positional argument but 2 were given

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