Update signature for _arrayfunction.__array__ (#9237)

* Update test_namedarray.py

* Update _typing.py

* Update test_namedarray.py

* Update test_namedarray.py

* Update _typing.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update _typing.py

* Add shapetypes

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix __array__ missing copy parameter

* try reverting shapetypes

* try reverting shapetypes

* Update test_namedarray.py

* Update _typing.py

---------

Co-authored-by: Maximilian Roos <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

xarray/namedarray/_typing.py

@@ -153,13 +153,16 @@ def __getitem__(
     ) -> _arrayfunction[Any, _DType_co] | Any: ...
 
     @overload
-    def __array__(self, dtype: None = ..., /) -> np.ndarray[Any, _DType_co]: ...
-
+    def __array__(
+        self, dtype: None = ..., /, *, copy: None | bool = ...
+    ) -> np.ndarray[Any, _DType_co]: ...
     @overload
-    def __array__(self, dtype: _DType, /) -> np.ndarray[Any, _DType]: ...
+    def __array__(
+        self, dtype: _DType, /, *, copy: None | bool = ...
+    ) -> np.ndarray[Any, _DType]: ...
 
     def __array__(
-        self, dtype: _DType | None = ..., /
+        self, dtype: _DType | None = ..., /, *, copy: None | bool = ...
     ) -> np.ndarray[Any, _DType] | np.ndarray[Any, _DType_co]: ...
 
     # TODO: Should return the same subclass but with a new dtype generic.

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])),  # type: ignore
+                NamedArray("time", np.array([1, 2, 3], dtype=np.dtype(np.int64))),
                 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)  # type: ignore
+        check_duck_array_typevar(numpy_a)
 
         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))  # type: ignore
+            NamedArray(("x", "x"), np.arange(4).reshape(2, 2))