python 中对象方法的多线程

Question

我正在尝试使用 oops 实现多线程


class test:
    def printer(self):
        for ctr in range(1000000):
            print("hello")

    def printHi(self):
        for ctr in range(1000000):
            print("hi")
            
if __name__ == "__main__":
    test1 = test()

    t1 = threading.Thread(target=test1.printHi, args=(10,))
    t2 = threading.Thread(target=test1.printer, args=(10,))
    t1.start()
    t2.start()
    print("Done!")

但是test1.printHi希望我通过自我

Exception in thread Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.9/threading.py", line 973, in _bootstrap_inner
Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python3.9/threading.py", line 973, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.9/threading.py", line 910, in run
    self.run()
  File "/usr/lib/python3.9/threading.py", line 910, in run
    self._target(*self._args, **self._kwargs)    self._target(*self._args, **self._kwargs)

TypeError: printHi() takes 1 positional argument but 2 were givenTypeError: 
printer() takes 1 positional argument but 2 were given
Done!

通过 self 之后就不再是多线程了

t1 = threading.Thread(target=test1.printHi())
t2 = threading.Thread(target=test1.printer())
t1.start()
print("next")
t2.start()

它首先打印所有 hi，然后 hello at last next 正在打印，但是当我像函数一样实现它们时，它正常工作，它们会立即组合打印。正确实现它的正确方法是什么，以便两个线程同时运行...

Answer 1

您似乎将额外的 10 传递给方法；尝试：


class test:
    def printer(self):
        for ctr in range(10):
            print("hello")
            time.sleep(1)

    def printHi(self):
        for ctr in range(10):
            print("hi")
            time.sleep(1)
            
if __name__ == "__main__":
    test1 = test()

    t1 = threading.Thread(target=test1.printHi, args=())
    t2 = threading.Thread(target=test1.printer, args=())
    t1.start()
    t2.start()
    print("Done!")

或者，如果你想保留参数，函数需要接受它：


class test:
    def printer(self, n):
        for ctr in range(10):
            print("hello", n)
            time.sleep(1)

    def printHi(self, n):
        for ctr in range(10):
            print("hi", n)
            time.sleep(1)
            
if __name__ == "__main__":
    test1 = test()

    t1 = threading.Thread(target=test1.printHi, args=(10,))
    t2 = threading.Thread(target=test1.printer, args=(10,))
    t1.start()
    t2.start()
    print("Done!")

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