model: Shuffle agents in select_agents to avoid bias

When n is defined, it should randomly select n agents. Therefore a shuffle step is added.
projectmesa · Dec 18, 2023 · c8c7a58 · c8c7a58
1 parent 3ce1afe
commit c8c7a58
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/mesa/model.py b/mesa/model.py
@@ -152,6 +152,8 @@ def select_agents(
         # Convert to list if sorting is needed or n is specified
         if sort and direction or n is not None:
             agents_iter = list(agents_iter)
+            # If n is specified, shuffle the agents to avoid bias
+            self.random.shuffle(agents_iter)
 
         # If only a specific number of agents is needed without sorting, limit early
         if n is not None and not (sort and direction):