feat: remove Python 3.7 support (#952)

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

.github/workflows/tests.yml

@@ -114,7 +114,7 @@ jobs:
           - os: windows-2019
             only: cp38-win32
           - os: windows-2019
-            only: cp37-win_amd64
+            only: cp313-win_amd64
           - os: macos-13
             only: cp39-macosx_x86_64
           - os: macos-14

.github/workflows/wheels.yml

@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: [37, 38, 39, 310, 311, 312, 313]
+        python: ["38", "39", "310", "311", "312", "313", "313t"]
         arch: [aarch64]
     steps:
       - uses: actions/checkout@v4

.pre-commit-config.yaml

@@ -36,19 +36,8 @@ repos:
       - id: prettier
         types_or: [yaml, markdown, html, css, scss, javascript, json]
 
-  - repo: https://github.com/asottile/setup-cfg-fmt
-    rev: v2.5.0
-    hooks:
-      - id: setup-cfg-fmt
-        args:
-          [
-            --include-version-classifiers,
-            --min-py3-version=3.7,
-            --max-py-version=3.12,
-          ]
-
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.5.6"
+    rev: "v0.6.2"
     hooks:
       - id: ruff
         args: ["--fix", "--show-fixes"]
@@ -61,7 +50,7 @@ repos:
     hooks:
       - id: mypy
         files: ^src
-        additional_dependencies: [numpy~=1.26.0, pytest, uhi, types-dataclasses]
+        additional_dependencies: [numpy~=1.26.0, pytest, uhi]
 
   - repo: https://github.com/codespell-project/codespell
     rev: v2.3.0
@@ -92,12 +81,12 @@ repos:
       - id: rst-inline-touching-normal
 
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.29.1
+    rev: 0.29.2
     hooks:
       - id: check-readthedocs
       - id: check-github-workflows
 
   - repo: https://github.com/henryiii/validate-pyproject-schema-store
-    rev: 2024.07.29
+    rev: 2024.08.19
     hooks:
       - id: validate-pyproject

README.md

@@ -178,10 +178,11 @@ python3 -m pip install boost-histogram
 ```
 
 All the normal best-practices for Python apply; Pip should not be very old (Pip
-9 is very old), you should be in a virtual environment, etc. Python 3.7+ is
+9 is very old), you should be in a virtual environment, etc. Python 3.8+ is
 required; for older versions of Python (3.5 and 2.7), `0.13` will be installed
 instead, which is API equivalent to 1.0, but will not be gaining new features.
-1.3.x was the last series to support Python 3.6.
+1.3.x was the last series to support Python 3.6. 1.4.x was the last series to
+support Python 3.7.
 
 #### Binaries available:
 
@@ -190,15 +191,15 @@ when you run the above command on a supported platform. Wheels are produced usin
 [cibuildwheel](https://cibuildwheel.readthedocs.io/en/stable/); all common
 platforms have wheels provided in boost-histogram:
 
-| System            | Arch   | Python versions                 | PyPy versions |
-| ----------------- | ------ | ------------------------------- | ------------- |
-| manylinux2014     | 64-bit | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 | 3.9, 3.10     |
-| manylinux2014     | ARM64  | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 | 3.9, 3.10     |
-| musllinux_1_1     | 64-bit | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 |               |
-| macOS 10.9+ Intel | 64-bit | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 | 3.9, 3.10     |
-| macOS 11+ AS      | Arm64  | 3.8, 3.9, 3.10, 3.11, 3.12      | 3.9, 3.10     |
-| Windows           | 32-bit | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 |               |
-| Windows           | 64-bit | 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 | 3.9, 3.10     |
+| System            | Arch   | Python versions                         | PyPy versions |
+| ----------------- | ------ | --------------------------------------- | ------------- |
+| manylinux2014     | 64-bit | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t | 3.9, 3.10     |
+| manylinux2014     | ARM64  | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t | 3.9, 3.10     |
+| musllinux_1_1     | 64-bit | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t |               |
+| macOS 10.9+ Intel | 64-bit | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t | 3.9, 3.10     |
+| macOS 11+ AS      | Arm64  | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t | 3.9, 3.10     |
+| Windows           | 32-bit | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t |               |
+| Windows           | 64-bit | 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t | 3.9, 3.10     |
 
 PowerPC or IBM-Z wheels are not provided but are available on request.
 

dev-requirements.txt

@@ -4,5 +4,4 @@ numpy
 pytest >=6,!=6.1.0,!=7.1.0
 pytest-benchmark
 setuptools_scm[toml] >=3.4,!=4.0.0
-typing_extensions; python_version<'3.8'
 uproot

pyproject.toml

@@ -7,7 +7,7 @@ name = "boost-histogram"
 dynamic = ["version"]
 description = "The Boost::Histogram Python wrapper."
 readme = "README.md"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 authors = [
     { name = "Hans Dembinski", email = "hans.dembinski@gmail.com" },
     { name = "Henry Schreiner", email = "hschrein@cern.ch" },
@@ -29,7 +29,6 @@ classifiers = [
     "Programming Language :: C++",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
@@ -49,7 +48,6 @@ classifiers = [
 ]
 dependencies = [
     "numpy",
-    "typing-extensions;python_version<'3.8'",
 ]
 
 [project.optional-dependencies]
@@ -165,7 +163,7 @@ build-frontend = "build[uv]"
 test-extras = "test"
 test-command = "pytest --benchmark-disable {project}/tests"
 skip = [
-  "pp3[78]-*",
+  "pp38-*",
 ]
 test-skip = [
   "cp*-musllinux_*", # Segfaults
@@ -187,7 +185,7 @@ environment.MACOSX_DEPLOYMENT_TARGET = "14.0"
 
 
 [tool.pylint]
-py-version = "3.7"
+py-version = "3.8"
 ignore-patterns = ['.*\.pyi']
 extension-pkg-allow-list = ["boost_histogram._core"]
 reports.output-format = "colorized"
@@ -212,10 +210,6 @@ messages_control.disable = [
   "wrong-import-position",
 ]
 
-[tool.ruff]
-target-version = "py37"
-src = ["src"]
-
 [tool.ruff.lint]
 extend-select = [
   "B",           # flake8-bugbear

src/boost_histogram/_core/accumulators.pyi

@@ -29,9 +29,9 @@ class WeightedSum(_BaseAccumulator):
     def __iadd__(self: T, arg0: float) -> T: ...
     def fill(self: T, value: ArrayLike, variance: ArrayLike | None = None) -> T: ...
     @staticmethod
-    def _make(self: T, a: ArrayLike, b: ArrayLike) -> T: ...
+    def _make(a: ArrayLike, b: ArrayLike) -> WeightedSum: ...
     @staticmethod
-    def _array(self: T, a: ArrayLike, b: ArrayLike) -> T: ...
+    def _array(a: ArrayLike, b: ArrayLike) -> WeightedSum: ...
     def __getitem__(self, key: str) -> float: ...
     def __setitem__(self, key: str, value: float) -> None: ...
 
@@ -76,12 +76,12 @@ class WeightedMean(_BaseAccumulator):
     def fill(self: T, value: ArrayLike, *, weight: ArrayLike | None = None) -> T: ...
     @staticmethod
     def _make(
-        self: T, arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike, arg3: ArrayLike
-    ) -> T: ...
+        arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike, arg3: ArrayLike
+    ) -> WeightedMean: ...
     @staticmethod
     def _array(
-        self: T, arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike, arg3: ArrayLike
-    ) -> T: ...
+        arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike, arg3: ArrayLike
+    ) -> WeightedMean: ...
     def __getitem__(self, key: str) -> float: ...
     def __setitem__(self, key: str, value: float) -> None: ...
 
@@ -103,8 +103,8 @@ class Mean(_BaseAccumulator):
     ) -> T: ...
     def fill(self: T, value: ArrayLike, *, weight: ArrayLike | None = None) -> T: ...
     @staticmethod
-    def _make(self: T, arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike) -> T: ...
+    def _make(arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike) -> Mean: ...
     @staticmethod
-    def _array(self: T, arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike) -> T: ...
+    def _array(arg0: ArrayLike, arg1: ArrayLike, arg2: ArrayLike) -> Mean: ...
     def __getitem__(self, key: str) -> float: ...
     def __setitem__(self, key: str, value: float) -> None: ...

src/boost_histogram/_internal/axestuple.py

@@ -1,12 +1,11 @@
 from __future__ import annotations
 
 from functools import partial
-from typing import Any, ClassVar, Iterable, TypeVar
+from typing import Any, ClassVar, Iterable, Literal, TypedDict, TypeVar
 
 import numpy as np
 
 from .axis import Axis
-from .typing import Literal, TypedDict
 from .utils import set_module, zip_strict
 
 A = TypeVar("A", bound="ArrayTuple")

src/boost_histogram/_internal/hist.py

@@ -16,6 +16,7 @@
     List,
     Mapping,
     NewType,
+    SupportsIndex,
     Tuple,
     TypeVar,
     Union,
@@ -30,7 +31,7 @@
 from .axis import Axis
 from .enum import Kind
 from .storage import Double, Storage
-from .typing import Accumulator, ArrayLike, CppHistogram, SupportsIndex
+from .typing import Accumulator, ArrayLike, CppHistogram
 from .utils import cast, register, set_module
 from .view import MeanView, WeightedMeanView, WeightedSumView, _to_view
 

src/boost_histogram/_internal/typing.py

@@ -1,12 +1,6 @@
 from __future__ import annotations
 
-import sys
-from typing import TYPE_CHECKING, Any, Tuple, Union
-
-if sys.version_info < (3, 8):
-    from typing_extensions import Literal, Protocol, SupportsIndex, TypedDict
-else:
-    from typing import Literal, Protocol, SupportsIndex, TypedDict
+from typing import TYPE_CHECKING, Any, Protocol, Tuple, Union
 
 if TYPE_CHECKING:
     from builtins import ellipsis
@@ -26,16 +20,12 @@
 
 
 __all__ = (
-    "Protocol",
     "CppHistogram",
-    "SupportsIndex",
     "AxisLike",
     "ArrayLike",
     "Ufunc",
     "StdIndex",
     "StrIndex",
-    "Literal",
-    "TypedDict",
 )
 
 

src/boost_histogram/_internal/utils.py

@@ -3,12 +3,10 @@
 import itertools
 import sys
 import typing
-from typing import Any, Callable, ClassVar, Iterator, TypeVar
+from typing import Any, Callable, ClassVar, Iterator, Protocol, TypeVar
 
 import boost_histogram
 
-from .typing import Protocol
-
 
 class Registerable(Protocol):
     _types: ClassVar[set[type[object]]]

src/boost_histogram/_internal/view.py

@@ -1,11 +1,11 @@
 from __future__ import annotations
 
-from typing import Any, Callable, ClassVar, Mapping, MutableMapping
+from typing import Any, Callable, ClassVar, Literal, Mapping, MutableMapping
 
 import numpy as np
 
 from ..accumulators import Mean, WeightedMean, WeightedSum
-from .typing import ArrayLike, Literal, StrIndex, Ufunc
+from .typing import ArrayLike, StrIndex, Ufunc
 
 UFMethod = Literal["__call__", "reduce", "reduceat", "accumulate", "outer", "inner"]
 
@@ -50,7 +50,7 @@ def __setitem__(self, ind: StrIndex, value: ArrayLike) -> None:
         msg = "Needs matching ndarray or n+1 dim array"
         if array.ndim == current_ndim + 1:
             if len(self._FIELDS) == array.shape[-1]:
-                self.__setitem__(ind, self._PARENT._array(*np.moveaxis(array, -1, 0)))
+                self.__setitem__(ind, self._PARENT._array(*np.moveaxis(array, -1, 0)))  # type: ignore[assignment]
                 return
             msg += f", final dimension should be {len(self._FIELDS)} for this storage, got {array.shape[-1]} instead"
             raise ValueError(msg)
@@ -224,7 +224,7 @@ def __array_ufunc__(
         # ufuncs that are allowed to reduce
         if ufunc in {np.add} and method == "reduce" and len(raw_inputs) == 1:
             results = (ufunc.reduce(self[field], **kwargs) for field in self._FIELDS)
-            return self._PARENT._make(*results)  # type: ignore[no-any-return]
+            return self._PARENT._make(*results)  # type: ignore[return-value]
 
         # ufuncs that are allowed to accumulate
         if ufunc in {np.add} and method == "accumulate" and len(raw_inputs) == 1:

tests/conftest.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import contextlib
+import importlib.metadata
 import sys
 from pathlib import Path
 
@@ -74,11 +75,6 @@ def count_single_storage(request):
 
 
 def pytest_report_header() -> str:
-    if sys.version_info < (3, 8):
-        import importlib_metadata as metadata
-    else:
-        from importlib import metadata
-
     with BASE.joinpath("pyproject.toml").open("rb") as f:
         pyproject = tomllib.load(f)
     project = pyproject.get("project", {})
@@ -94,7 +90,7 @@ def pytest_report_header() -> str:
     valid = []
     for package in sorted(interesting_packages):
         with contextlib.suppress(ModuleNotFoundError):
-            valid.append(f"{package}=={metadata.version(package)}")
+            valid.append(f"{package}=={importlib.metadata.version(package)}")
     reqs = " ".join(valid)
     lines = [
         f"installed packages of interest: {reqs}",

tests/test_axes_object.py

@@ -7,7 +7,7 @@
 import boost_histogram as bh
 
 
-@pytest.fixture()
+@pytest.fixture
 def h():
     return bh.Histogram(
         bh.axis.Regular(10, 0, 10, metadata=2),

tests/test_histogram.py

@@ -1104,10 +1104,6 @@ def test_fill_with_sequence_3():
     assert_array_equal(h.view(True), [3, 1])
 
 
-@pytest.mark.skipif(
-    platform.machine() == "ppc64le" and sys.version_info < (3, 8),
-    reason="ppc64le segfault",
-)
 def test_fill_with_sequence_4():
     h = bh.Histogram(
         bh.axis.StrCategory([], growth=True), bh.axis.Integer(0, 0, growth=True)

tests/test_views.py

@@ -8,7 +8,7 @@
 import boost_histogram as bh
 
 
-@pytest.fixture()
+@pytest.fixture
 def v():
     h = bh.Histogram(bh.axis.Integer(0, 4), storage=bh.storage.Weight())
     h.fill([1, 1, 1, 2, 2, 3])