1. 解释RuntimeError: threads can only be started once的含义 当你尝试对一个已经启动过的线程对象再次调用start()方法时,Python会抛出RuntimeError: threads can only be started once异常。这是因为线程的生命周期是线性的,一旦线程开始执行,它就不能被重新启动。如果你需要线程再次执行某些任务,通常的做法是重...
RuntimeError: threads can only be started once correct：for i in range(4):thread=threading.Thread(target=sockThread)thread.start()res：this is [<_MainThread(MainThread, stopped 14184)>, <Thread(Thread-1, started 10784)>
python "threads can only be started once"解决方法 import threadingimport timeclass Thread(threading.Thread): def __init__(self, i): threading.Thread.__init__(self) self.name = 'crawlers - ' + str(i+1) def run(self): print 'test --- ' + self.name #...
Hi, I am having this strange problem, I am writing tests on restarting a websocket enabled CherryPy server, and for some reason, when I by using runpy.run_module starts a new process instance, I get the "threads can only be started once"...
RuntimeError: threads can only be started once 从上面例子中可以看到子线程存活时的名字和线程ID,但在线程退出后,尝试再次启动线程时,抛出RuntimeError异常,表明线程对象在定义后只能启动一次。 举例getName()和setName(): 1 2 3 4 5 6 7 8
#不可以,RuntimeError: threads can only be started once start方法 importthreadingimporttimeclassMyThread(threading.Thread):defrun(self):print('run') super().run()defstart(self):print('start')returnsuper().start()defworker(): count=0whileTrue:ifcount>2:breaktime.sleep(0.5)...
Error异常 File "<stdin>", line 1, in <module> File "/usr/local/Cellar/python@ 2/2.7.15_1/Frameworks/Python.framework/Versions /2.7/lib/python2.7/threading.py", line 730, in start raise RuntimeError("threads can only be started once") RuntimeError: threads can only be started once...
raise RuntimeError("threads can only be started once") with _active_limbo_lock: _limbo[self] = self try: _start_new_thread(self._bootstrap, ()) # 启动一个线程 except Exception: with _active_limbo_lock: del _limbo[self] raise
5、死亡态:当线程的run()方法完成时就认为它死去。这个线程对象也许是活的,但是,它已经不是一个单独执行的线程。线程一旦死亡,就不能复生。如果在一个死去的线程上调用start()方法,会抛出RuntimeError: threads can only be started once异常。 5.线程g共享全局变量 ...
same threadobject."""ifnotself._initialized: #构造函数中会进行设置为Trueraise RuntimeError("thread.__init__() not called")ifself._started.is_set(): #此时为Falseraise RuntimeError("threads can only be started once") with _active_limbo_lock: ...