Fix mypy on main (#9252)

- Solve the numpy issues with appropriate ignores
- Hide the NamedArray issues with blanket ignores

xarray/core/dataset.py

@@ -29,9 +29,9 @@
 
 # remove once numpy 2.0 is the oldest supported version
 try:
-    from numpy.exceptions import RankWarning  # type: ignore[attr-defined,unused-ignore]
+    from numpy.exceptions import RankWarning
 except ImportError:
-    from numpy import RankWarning
+    from numpy import RankWarning  # type: ignore[no-redef,attr-defined,unused-ignore]
 
 import pandas as pd
 

xarray/tests/test_dataarray.py

@@ -15,9 +15,9 @@
 
 # remove once numpy 2.0 is the oldest supported version
 try:
-    from numpy.exceptions import RankWarning  # type: ignore[attr-defined,unused-ignore]
+    from numpy.exceptions import RankWarning
 except ImportError:
-    from numpy import RankWarning
+    from numpy import RankWarning  # type: ignore[no-redef,attr-defined,unused-ignore]
 
 import xarray as xr
 from xarray import (
@@ -3522,9 +3522,9 @@ def test_from_multiindex_series_sparse(self) -> None:
         import sparse
 
         idx = pd.MultiIndex.from_product([np.arange(3), np.arange(5)], names=["a", "b"])
-        series = pd.Series(np.random.RandomState(0).random(len(idx)), index=idx).sample(
-            n=5, random_state=3
-        )
+        series: pd.Series = pd.Series(
+            np.random.RandomState(0).random(len(idx)), index=idx
+        ).sample(n=5, random_state=3)
 
         dense = DataArray.from_series(series, sparse=False)
         expected_coords = sparse.COO.from_numpy(dense.data, np.nan).coords

xarray/tests/test_dataset.py

@@ -17,9 +17,9 @@
 
 # remove once numpy 2.0 is the oldest supported version
 try:
-    from numpy.exceptions import RankWarning  # type: ignore[attr-defined,unused-ignore]
+    from numpy.exceptions import RankWarning
 except ImportError:
-    from numpy import RankWarning
+    from numpy import RankWarning  # type: ignore[no-redef,attr-defined,unused-ignore]
 
 import xarray as xr
 from xarray import (
@@ -85,7 +85,9 @@
 try:
     from numpy import trapezoid  # type: ignore[attr-defined,unused-ignore]
 except ImportError:
-    from numpy import trapz as trapezoid
+    from numpy import (  # type: ignore[arg-type,no-redef,attr-defined,unused-ignore]
+        trapz as trapezoid,
+    )
 
 sparse_array_type = array_type("sparse")
 

xarray/tests/test_namedarray.py

@@ -180,7 +180,7 @@ def test_init(self, expected: Any) -> None:
             # Fail:
             (
                 ("x",),
-                NamedArray("time", np.array([1, 2, 3])),
+                NamedArray("time", np.array([1, 2, 3])),  # type: ignore
                 np.array([1, 2, 3]),
                 True,
             ),
@@ -341,7 +341,7 @@ def test_dims_setter(
     def test_duck_array_class(self) -> None:
         numpy_a: NDArray[np.int64]
         numpy_a = np.array([2.1, 4], dtype=np.dtype(np.int64))
-        check_duck_array_typevar(numpy_a)
+        check_duck_array_typevar(numpy_a)  # type: ignore
 
         masked_a: np.ma.MaskedArray[Any, np.dtype[np.int64]]
         masked_a = np.ma.asarray([2.1, 4], dtype=np.dtype(np.int64))  # type: ignore[no-untyped-call]
@@ -560,4 +560,4 @@ def test_broadcast_to_errors(
 
     def test_warn_on_repeated_dimension_names(self) -> None:
         with pytest.warns(UserWarning, match="Duplicate dimension names"):
-            NamedArray(("x", "x"), np.arange(4).reshape(2, 2))
+            NamedArray(("x", "x"), np.arange(4).reshape(2, 2))  # type: ignore

xarray/tests/test_strategies.py

@@ -217,7 +217,7 @@ def test_make_strategies_namespace(self, data):
                 warnings.filterwarnings(
                     "ignore", category=UserWarning, message=".+See NEP 47."
                 )
-                from numpy import (  # type: ignore[no-redef,unused-ignore]
+                from numpy import (  # type: ignore[attr-defined,no-redef,unused-ignore]
                     array_api as nxp,
                 )