Guard log failure for responses without mac

Author: brefra

plugwise/controller.py

@@ -226,18 +226,21 @@ def _send_message_loop(self):
                 # if previous seq_id is unknown use fake b"0000"
                 seq_id = inc_seq_id(self.last_seq_id)
                 self.expected_responses[seq_id] = request_set
+                mac = "None"
+                if hasattr(self.expected_responses[seq_id][0], "mac"):
+                    mac = self.expected_responses[seq_id][0].mac
                 if self.expected_responses[seq_id][2] == 0:
                     _LOGGER.info(
                         "Send %s to %s using seq_id %s",
                         self.expected_responses[seq_id][0].__class__.__name__,
-                        self.expected_responses[seq_id][0].mac,
+                        mac,
                         str(seq_id),
                     )
                 else:
                     _LOGGER.info(
                         "Resend %s to %s using seq_id %s, retry %s",
                         self.expected_responses[seq_id][0].__class__.__name__,
-                        self.expected_responses[seq_id][0].mac,
+                        mac,
                         str(seq_id),
                         str(self.expected_responses[seq_id][2]),
                     )