futures.py 文件源码

def __del__(self):
        if self.tb:
            msg = 'Future/Task exception was never retrieved\n'
            if self.source_traceback:
                src = ''.join(traceback.format_list(self.source_traceback))
                msg += 'Future/Task created at (most recent call last):\n'
                msg += '%s\n' % src.rstrip()
            msg += ''.join(self.tb).rstrip()
            self.loop.call_exception_handler({'message': msg})


#########################################
#             Future ?
#
# ??:
#   - ???
#   - Future??????iter??????
#   - ?????????:
#       - BaseEventLoop() ??, ?????
#       - Task() ??, ?????
#       - ???????, ?????
#
#########################################