bugfix

Author: quaquel

mesa/model.py

@@ -94,7 +94,7 @@ def __init__(
             self._seed = seed  # this allows for reproducing stdlib.random
 
             try:
-                self.rng: np.random.Generator = np.random.default_rng(rng)
+                self.rng: np.random.Generator = np.random.default_rng(seed)
             except TypeError:
                 rng = self.random.randint(0, sys.maxsize)
                 self.rng: np.random.Generator = np.random.default_rng(rng)

tests/test_model.py

@@ -1,4 +1,5 @@
 """Tests for model.py."""
+import numpy as np
 
 from mesa.agent import Agent, AgentSet
 from mesa.model import Model
@@ -37,6 +38,9 @@ def test_seed(seed=23):
     assert model2._seed == seed + 1
     assert model._seed == seed
 
+    assert Model(seed=42).random.random() == Model(seed=42).random.random()
+    assert np.all(Model(seed=42).rng.random(10,) == Model(seed=42).rng.random(10,))
+
 
 def test_reset_randomizer(newseed=42):
     """Test resetting the random seed on the model."""