Support pandas 3

.github/workflows/full_test.yml

@@ -21,6 +21,10 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
+    # Without this, `uv run` re-syncs the environment from the lockfile and
+    # silently undoes the pandas version installed below.
+    env:
+      UV_NO_SYNC: "1"
     strategy:
       matrix:
         python-version: ["3.12", "3.14"]
@@ -42,14 +46,16 @@ jobs:
 
       - name: Install pandas 2.x
         if: matrix.pandas-version == 'pandas2'
-        run: uv run pip install "pandas>=2.0,<3.0"
+        run: uv pip install "pandas>=2.0,<3.0"
 
       - name: Install pandas 3.x
         if: matrix.pandas-version == 'pandas3'
-        run: uv run pip install "pandas>=3.0,<4.0"
+        run: uv pip install "pandas>=3.0,<4.0"
 
-      - name: Show pandas version
-        run: uv run python -c "import pandas; print(f'pandas {pandas.__version__}')"
+      - name: Check pandas version
+        env:
+          EXPECTED_MAJOR: ${{ matrix.pandas-version == 'pandas3' && '3' || '2' }}
+        run: uv run python -c "import os, pandas; v = pandas.__version__; print('pandas', v); assert v.split('.')[0] == os.environ['EXPECTED_MAJOR'], v"
 
       - name: Type check
         run: just typecheck

pyproject.toml

@@ -11,7 +11,7 @@ name = "modelskill"
 version = "1.4.0a3"
 dependencies = [
     "numpy  > 1.24.4",
-    "pandas >= 1.4, < 3.0", # TODO remove upper limit
+    "pandas >= 2.2",
     "mikeio >= 1.2",
     "matplotlib",
     "xarray",

src/modelskill/comparison/_comparison.py

@@ -495,7 +495,7 @@ def __init__(
             else {
                 # key: ModelResult(value, gtype=self.data.gtype, name=key, x=self.x, y=self.y)
                 str(key): PointModelResult(self.data[[str(key)]], name=str(key))
-                for key, value in matched_data.data_vars.items()
+                for key, value in self.data.data_vars.items()
                 if value.attrs["kind"] == "model"
             }
         )