Stabilize AgentSet

Removes the experimental warning for the AgentSet.

mesa/agent.py

@@ -10,7 +10,6 @@
 import contextlib
 import copy
 import operator
-import warnings
 import weakref
 from collections import defaultdict
 from collections.abc import Iterable, Iterator, MutableSet, Sequence
@@ -81,12 +80,6 @@ def random(self) -> Random:
 
 class AgentSet(MutableSet, Sequence):
     """
-    .. warning::
-        The AgentSet is experimental. It may be changed or removed in any and all future releases, including
-        patch releases.
-        We would love to hear what you think about this new feature. If you have any thoughts, share them with
-        us here: https://github.com/projectmesa/mesa/discussions/1919
-
     A collection class that represents an ordered set of agents within an agent-based model (ABM). This class
     extends both MutableSet and Sequence, providing set-like functionality with order preservation and
     sequence operations.
@@ -115,18 +108,11 @@ def __init__(self, agents: Iterable[Agent], model: Model):
             agents (Iterable[Agent]): An iterable of Agent objects to be included in the set.
             model (Model): The ABM model instance to which this AgentSet belongs.
         """
-        self.model = model
+        self._agents = weakref.WeakKeyDictionary()
+        for agent in agents:
+            self._agents[agent] = None
 
-        if not self.__class__.agentset_experimental_warning_given:
-            self.__class__.agentset_experimental_warning_given = True
-            warnings.warn(
-                "The AgentSet is experimental. It may be changed or removed in any and all future releases, including patch releases.\n"
-                "We would love to hear what you think about this new feature. If you have any thoughts, share them with us here: https://github.com/projectmesa/mesa/discussions/1919",
-                FutureWarning,
-                stacklevel=2,
-            )
-
-        self._agents = weakref.WeakKeyDictionary({agent: None for agent in agents})
+        self.model = model
 
     def __len__(self) -> int:
         """Return the number of agents in the AgentSet."""

mesa/model.py

@@ -76,9 +76,6 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
         self._steps: int = 0
         self._time: TimeT = 0  # the model's clock
 
-        # Warning flags for current experimental features. These make sure a warning is only printed once per model.
-        self.agentset_experimental_warning_given = False
-
     @property
     def agents(self) -> AgentSet:
         """Provides an AgentSet of all agents in the model, combining agents from all types."""