check for None

SpiNNakerManchester · Jan 9, 2024 · d2646b3 · d2646b3
1 parent a709d9e
commit d2646b3
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mcmc/mcmc_coordinator_vertex.py b/mcmc/mcmc_coordinator_vertex.py
@@ -226,7 +226,8 @@ def generate_data_specification(
             if self._is_receiver_placement(mcmc_placement):
                 key = routing_info.get_first_key_from_pre_vertex(
                     vertex, self._acknowledge_partition_name)
-                keys.append(key)
+                if key is not None:
+                    keys.append(key)
         keys.sort()
 
         # Write the data size in words