What happens to thread started in the class instance when all references to the instance are destroyed (Python)?

Question

Question is in the title.

Code example:

class A:
    def start_thread(self):
        t1 = threading.Thread(target=something)
        t1.start()

a = A()
a.start_thread()
a = A()

So, what happens to the thread, which we started?

Answer 1

threading模块本身保留对每个活动Thread对象的引用，因此即使引用消失，正在运行的线程也将继续运行。

Answer 2

线程保存在 Python 运行时的单独注册表中，您可以通过调用threading.enumerate ( https://docs.python.org/3/library/threading.html#threading.enumerate ) 来“查看”它们 - 这是没有什么不同，然后不保留对以任何其他方式启动的线程的引用。