Bump policyengine-core to 3.23.5 for pandas 3.0 compatibility

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    changed:
+      - Bumped policyengine-core minimum version to 3.23.5 for pandas 3.0 compatibility

policyengine_us_data/tests/test_pandas3_compatibility.py

@@ -0,0 +1,33 @@
+"""Test pandas 3.0 compatibility.
+
+This test verifies that policyengine-core 3.23.5+ correctly handles
+pandas Series with StringDtype index when encoding enums.
+"""
+
+import numpy as np
+import pandas as pd
+import pytest
+
+from policyengine_core.enums import Enum
+
+
+class SampleEnum(Enum):
+    VALUE_A = "value_a"
+    VALUE_B = "value_b"
+
+
+def test_enum_encode_with_pandas_series():
+    """Test that Enum.encode works with pandas Series containing enum items.
+
+    In pandas 3.0, Series with StringDtype use label-based indexing by default.
+    This test verifies the fix in policyengine-core 3.23.5 that uses .iloc[0]
+    for positional access.
+    """
+    enum_items = [SampleEnum.VALUE_A, SampleEnum.VALUE_B, SampleEnum.VALUE_A]
+    series = pd.Series(enum_items)
+
+    # This would fail with KeyError: 0 before the fix
+    encoded = SampleEnum.encode(series)
+
+    assert len(encoded) == 3
+    assert list(encoded) == [0, 1, 0]

pyproject.toml

@@ -22,11 +22,11 @@ classifiers = [
 ]
 dependencies = [
     "policyengine-us>=1.353.0",
-    "policyengine-core>=3.19.0",
+    "policyengine-core>=3.23.6",
     "pandas>=2.3.1",
     "requests>=2.25.0",
     "tqdm>=4.60.0",
-    "microdf_python>=1.0.0",
+    "microdf_python>=1.2.1",
     "setuptools>=60",
     "microimpute>=1.1.4",
     "pip-system-certs>=3.0",