def __init__(self, thread_id, arg, curr_frame_id):
        '''
        :param arg: exception type, description, traceback object
        '''
        self.sequence = 0
        self.thread_id = thread_id
        self.curr_frame_id = curr_frame_id
        self.arg = arg

        :param arg: exception type, description, traceback object
        
debugger/src/_pydevd_bundle/pydevd_comm.py