threading.py 文件源码

def ident(self):
        """Thread identifier of this thread or None if it has not been started.

        This is a nonzero integer. See the thread.get_ident() function. Thread
        identifiers may be recycled when a thread exits and another thread is
        created. The identifier is available even after the thread has exited.

        """
        assert self.__initialized, "Thread.__init__() not called"
        return self.__ident