Change rng.__getstate__ to rng.bit_generator.state

numpy.random.Generator.__getstate__()
now returns none; to see the state of
the bit generator, you need to use
Generator.bit_generator.state.

This change affects `RandomGeneratorType`, and
several of the random tests (including some for Jax.)

Author: brendan-m-murphy

pytensor/link/jax/dispatch/random.py

@@ -56,7 +56,7 @@ def assert_size_argument_jax_compatible(node):
 
 @jax_typify.register(Generator)
 def jax_typify_Generator(rng, **kwargs):
-    state = rng.__getstate__()
+    state = rng.bit_generator.state
     state["bit_generator"] = numpy_bit_gens[state["bit_generator"]]
 
     # XXX: Is this a reasonable approach?

pytensor/tensor/random/type.py

@@ -87,8 +87,8 @@ def filter(self, data, strict=False, allow_downcast=None):
 
     @staticmethod
     def values_eq(a, b):
-        sa = a if isinstance(a, dict) else a.__getstate__()
-        sb = b if isinstance(b, dict) else b.__getstate__()
+        sa = a if isinstance(a, dict) else a.bit_generator.state
+        sb = b if isinstance(b, dict) else b.bit_generator.state
 
         def _eq(sa, sb):
             for key in sa:

tests/link/jax/test_random.py

@@ -63,7 +63,9 @@ def test_random_updates(rng_ctor):
     assert all(
         a == b if not isinstance(a, np.ndarray) else np.array_equal(a, b)
         for a, b in zip(
-            rng.get_value().__getstate__(), original_value.__getstate__(), strict=True
+            rng.get_value().bit_generator.state,
+            original_value.bit_generator.state,
+            strict=True,
         )
     )
 

tests/tensor/random/test_type.py

@@ -52,7 +52,7 @@ def test_filter(self):
         with pytest.raises(TypeError):
             rng_type.filter(1)
 
-        rng_dict = rng.__getstate__()
+        rng_dict = rng.bit_generator.state
 
         assert rng_type.is_valid_value(rng_dict) is False
         assert rng_type.is_valid_value(rng_dict, strict=False)
@@ -88,13 +88,13 @@ def test_values_eq(self):
         assert rng_type.values_eq(bitgen_g, bitgen_h)
 
         assert rng_type.is_valid_value(bitgen_a, strict=True)
-        assert rng_type.is_valid_value(bitgen_b.__getstate__(), strict=False)
+        assert rng_type.is_valid_value(bitgen_b.bit_generator.state, strict=False)
         assert rng_type.is_valid_value(bitgen_c, strict=True)
-        assert rng_type.is_valid_value(bitgen_d.__getstate__(), strict=False)
+        assert rng_type.is_valid_value(bitgen_d.bit_generator.state, strict=False)
         assert rng_type.is_valid_value(bitgen_e, strict=True)
-        assert rng_type.is_valid_value(bitgen_f.__getstate__(), strict=False)
+        assert rng_type.is_valid_value(bitgen_f.bit_generator.state, strict=False)
         assert rng_type.is_valid_value(bitgen_g, strict=True)
-        assert rng_type.is_valid_value(bitgen_h.__getstate__(), strict=False)
+        assert rng_type.is_valid_value(bitgen_h.bit_generator.state, strict=False)
 
     def test_may_share_memory(self):
         bg_a = np.random.PCG64()

tests/tensor/random/test_utils.py

@@ -165,14 +165,20 @@ def test_seed(self, rng_ctor):
         state_rng = random.state_updates[0][0].get_value(borrow=True)
 
         if hasattr(state_rng, "get_state"):
-            ref_state = ref_rng.get_state()
             random_state = state_rng.get_state()
+
+            # hack to try to get something reasonable for ref_rng
+            try:
+                ref_state = ref_rng.get_state()
+            except AttributeError:
+                ref_state = list(ref_rng.bit_generator.state.values())
+
             assert np.array_equal(random_state[1], ref_state[1])
             assert random_state[0] == ref_state[0]
             assert random_state[2:] == ref_state[2:]
         else:
-            ref_state = ref_rng.__getstate__()
-            random_state = state_rng.__getstate__()
+            ref_state = ref_rng.bit_generator.state
+            random_state = state_rng.bit_generator.state
             assert random_state["bit_generator"] == ref_state["bit_generator"]
             assert random_state["state"] == ref_state["state"]