Pass through model.rgn in agent analogous to model.random (#2400)

* pass through model.rgn in agent analogous to model.random

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* add test docstring for ruff

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

mesa/agent.py

@@ -21,6 +21,8 @@
 # mypy
 from typing import TYPE_CHECKING, Any, Literal, overload
 
+import numpy as np
+
 if TYPE_CHECKING:
     # We ensure that these are not imported during runtime to prevent cyclic
     # dependency.
@@ -85,9 +87,14 @@ def advance(self) -> None:  # noqa: D102
 
     @property
     def random(self) -> Random:
-        """Return a seeded rng."""
+        """Return a seeded stdlib rng."""
         return self.model.random
 
+    @property
+    def rng(self) -> np.random.Generator:
+        """Return a seeded np.random rng."""
+        return self.model.rng
+
 
 class AgentSet(MutableSet, Sequence):
     """A collection class that represents an ordered set of agents within an agent-based model (ABM).

tests/test_agent.py

@@ -162,6 +162,14 @@ def test_agent_membership():
     assert AgentTest(model) not in agentset
 
 
+def test_agent_rng():
+    """Test whether agent.random and agent.rng are equal to model.random and model.rng."""
+    model = Model(seed=42)
+    agent = Agent(model)
+    assert agent.random is model.random
+    assert agent.rng is model.rng
+
+
 def test_agent_add_remove_discard():
     """Test adding, removing and discarding agents from AgentSet."""
     model = Model()