COMPAT: pandas 3 compatibility (#73)

* COMPAT: pandas 3 compatibility

* fix

* pull mgwr from git

Author: martinfleis

ci/py313_dev.yaml

@@ -8,7 +8,6 @@ dependencies:
   - pip
   # testing
   - geodatasets
-  - mgwr
   - pre-commit
   - pytest
   - pytest-cov
@@ -20,7 +19,9 @@ dependencies:
         --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple  \
         --extra-index-url https://pypi.org/simple
       - numpy
+      - pandas
       - scipy
       - scikit-learn
       - git+https://github.com/geopandas/geopandas.git
       - git+https://github.com/pysal/libpysal.git
+      - git+https://github.com/pysal/mgwr.git

gwlearn/base.py

@@ -1088,7 +1088,7 @@ def _predict_local_ensemble(
                 with open(local_model, "rb") as f:
                     local_model = load(f)
 
-            if local_model is not None:
+            if not pd.isna(local_model):
                 pred.append(
                     pd.Series(
                         local_model.predict_proba(x_).flatten(),
@@ -1120,7 +1120,7 @@ def _predict_local_nearest(self, x_: pd.DataFrame, model_id: Hashable) -> pd.Ser
             with open(local_model, "rb") as f:
                 local_model = load(f)
 
-        if local_model is not None:
+        if not pd.isna(local_model):
             return pd.Series(
                 local_model.predict_proba(x_).flatten(),
                 index=local_model.classes_,