Fix for projectmesa#919, adding exception for duplicate ids

robertmay615 · Sep 12, 2020 · 6fe7a43 · 6fe7a43
1 parent f15b272
commit 6fe7a43
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/mesa/time.py b/mesa/time.py
@@ -60,6 +60,10 @@ def add(self, agent: Agent) -> None:
             have a step() method.
 
         """
+
+        if agent.unique_id in self._agents:
+            raise Exception("Agent with unique id {0} already added to scheduler".format(repr(agent.unique_id)))
+
         self._agents[agent.unique_id] = agent
 
     def remove(self, agent: Agent) -> None: