span.py 文件源码

def set_exc_info(self, exc_type, exc_val, exc_tb):
        """ Tag the span with an error tuple as from `sys.exc_info()`. """
        if not (exc_type and exc_val and exc_tb):
            return # nothing to do

        self.error = 1

        # get the traceback
        buff = StringIO()
        traceback.print_exception(exc_type, exc_val, exc_tb, file=buff, limit=20)
        tb = buff.getvalue()

        # readable version of type (e.g. exceptions.ZeroDivisionError)
        exc_type_str = "%s.%s" % (exc_type.__module__, exc_type.__name__)

        self.set_tag(errors.ERROR_MSG, exc_val)
        self.set_tag(errors.ERROR_TYPE, exc_type_str)
        self.set_tag(errors.ERROR_STACK, tb)