线程未启动：TypeError: backgroundTask() 接受 1 个位置参数，但给出了 2 个

Question

我正在 python 中学习多线程。 谁能告诉我为什么线程没有启动？

代码：导入线程导入时间导入日志

class Threads_2:

def __new__(cls):
    """
    this will be invoked once the creation procedure of the object begins
    """
    instance = super(Threads_2,cls).__new__(cls)
    return instance

def __init__(self):
    """
    this will be invoked once the initialisation procedure of the object begins
    """
    #self.configLogging()
    #threadinf.Thread.__init__(self)
    #self.spawnThreads()

def spawnThreads(self):
    if __name__ == "__main__":
        thread1 = threading.Thread(target=self.backgroundTask, args=(10,))
        thread1.start()

def backgroundTask(numOfLoops):
    for i in numOfLoops:
        print(2)


obj = Threads_2()
obj.spawnThreads()

错误：

Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Users\xxx\AppData\Local\Programs\Python\Python39\lib\threading.py", line 954, in _bootstrap_inner
self.run()
File "C:\Users\xxx\AppData\Local\Programs\Python\Python39\lib\threading.py", line 892, in run
self._target(*self._args, **self._kwargs)
TypeError: backgroundTask() takes 1 positional argument but 2 were given
PS D:\python workspace>

Answer 1

function backgroundTask 在 class Threads_2 中。 所以，它应该是 backgroundTask(self, numOfLoops) 而不是 backgroundTask(numOfLoops)。