BLD: drop support for CPython 3.9 and numpy<1.23 following SPEC 0

.github/workflows/cd.yml

@@ -29,7 +29,7 @@ jobs:
       with:
         output-dir: dist
       env:
-        CIBW_BUILD: cp39-* cp310-* cp311-* cp312-*
+        CIBW_BUILD: cp310-* cp311-* cp312-*
         CIBW_ARCHS_LINUX: x86_64
         CIBW_ARCHS_MACOS: x86_64 arm64
         CIBW_ARCHS_WINDOWS: AMD64

.github/workflows/ci.yml

@@ -41,7 +41,6 @@ jobs:
         os:
         - ubuntu-latest
         python-version:
-        - '3.9'
         - '3.10'
         - '3.11'
         - '3.12'
@@ -53,7 +52,7 @@ jobs:
 
         # test with minimal requirements
         - os: ubuntu-20.04
-          python-version: '3.9'
+          python-version: '3.10'
           pip-args: --constraint constraints/minimal_dependencies.txt
 
     runs-on: ${{ matrix.os }}
@@ -177,7 +176,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-        - '3.9'
+        - '3.10'
         - '3.12'
     runs-on: ubuntu-latest
     name: type check

constraints/minimal_dependencies.txt

@@ -1 +1 @@
-numpy==1.21 --only-binary numpy
+numpy==1.23 --only-binary numpy

pyproject.toml

@@ -19,11 +19,11 @@ classifiers = [
     "Programming Language :: Cython",
     "Programming Language :: Python :: 3",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     # keep in sync with NPY_TARGET_VERSION (setup.py)
     # https://github.com/scipy/oldest-supported-numpy/issues/76#issuecomment-1628865694
-    "numpy>=1.21",
+    "numpy>=1.23",
     "typing-extensions>=4.0.0 ; python_version < '3.11'",
 ]
 
@@ -105,7 +105,7 @@ convention = "numpy"
 "_backports.py" = ["D"]
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 show_error_codes = true
 pretty = true
 warn_return_any = true

setup.py

@@ -16,7 +16,7 @@ def make_ext(path: str) -> Extension:
         include_dirs=[numpy.get_include()],
         define_macros=[
             # keep in sync with runtime requirements (pyproject.toml)
-            ("NPY_TARGET_VERSION", "NPY_1_21_API_VERSION"),
+            ("NPY_TARGET_VERSION", "NPY_1_23_API_VERSION"),
             ("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION"),
         ],
     )

src/gpgi/_boundaries.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import warnings
-from typing import TYPE_CHECKING, Any, Callable, Literal, cast
+from collections.abc import Callable
+from typing import TYPE_CHECKING, Any, Literal, cast
 
 if TYPE_CHECKING:
     from ._typing import RealArray

src/gpgi/types.py

@@ -186,7 +186,7 @@ def _validate_geometry(self) -> None:
             )  # pragma: no cover
 
         axes = known_axes[self.geometry][: len(self.axes)]
-        for i, (expected, actual) in enumerate(zip(axes, self.axes)):
+        for i, (expected, actual) in enumerate(zip(axes, self.axes, strict=True)):
             if actual != expected:
                 raise ValueError(
                     f"Got invalid axis name {actual!r} on position {i}, "
@@ -826,7 +826,7 @@ def _apply_boundary_conditions(
             # as a way to *expose* ordering.
             iax = axes.index(ax)
             bcs = tuple(self.boundary_recipes[key] for key in bv)
-            for side, bc in zip(("left", "right"), bcs):
+            for side, bc in zip(("left", "right"), bcs, strict=True):
                 side = cast(Literal["left", "right"], side)
                 active_index: int = 1 if side == "left" else -2
                 same_side_active_layer_idx = [slice(None)] * self.grid.ndim