deps(python): drop Python 3.7 support

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.7 - 3.10" # sync with requires-python in pyproject.toml
+          python-version: "3.8 - 3.11" # sync with requires-python in pyproject.toml
           update-environment: true
 
       - name: Set __release__
@@ -96,14 +96,14 @@ jobs:
         run: |
           make pytest
 
-  build-wheels-py37:
+  build-wheels-py38:
     name: Build wheels for Python ${{ matrix.python-version }} on ubuntu-latest
     runs-on: ubuntu-latest
     needs: [build]
     if: github.repository == 'metaopt/torchopt' && (github.event_name != 'push' || startsWith(github.ref, 'refs/tags/'))
     strategy:
       matrix:
-        python-version: ["3.7"] # sync with requires-python in pyproject.toml
+        python-version: ["3.8"] # sync with requires-python in pyproject.toml
       fail-fast: false
     timeout-minutes: 60
     steps:
@@ -142,18 +142,18 @@ jobs:
 
       - uses: actions/upload-artifact@v3
         with:
-          name: wheels-py37
+          name: wheels-py38
           path: wheelhouse/*.whl
           if-no-files-found: error
 
   build-wheels:
     name: Build wheels for Python ${{ matrix.python-version }} on ubuntu-latest
     runs-on: ubuntu-latest
-    needs: [build, build-wheels-py37]
+    needs: [build, build-wheels-py38]
     if: github.repository == 'metaopt/torchopt' && (github.event_name != 'push' || startsWith(github.ref, 'refs/tags/'))
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10"] # sync with requires-python in pyproject.toml
+        python-version: ["3.9", "3.10"] # sync with requires-python in pyproject.toml
       fail-fast: false
     timeout-minutes: 60
     steps:
@@ -198,7 +198,7 @@ jobs:
 
   publish:
     runs-on: ubuntu-latest
-    needs: [build, build-wheels-py37, build-wheels]
+    needs: [build, build-wheels-py38, build-wheels]
     if: |
       github.repository == 'metaopt/torchopt' && github.event_name != 'pull_request' &&
       (github.event_name != 'workflow_dispatch' || github.event.inputs.task == 'build-and-publish') &&
@@ -215,7 +215,7 @@ jobs:
         uses: actions/setup-python@v4
         if: startsWith(github.ref, 'refs/tags/')
         with:
-          python-version: "3.7 - 3.11" # sync with requires-python in pyproject.toml
+          python-version: "3.8 - 3.11" # sync with requires-python in pyproject.toml
           update-environment: true
 
       - name: Set __release__
@@ -249,7 +249,7 @@ jobs:
         with:
           # unpacks default artifact into dist/
           # if `name: artifact` is omitted, the action will create extra parent dir
-          name: wheels-py37
+          name: wheels-py38
           path: dist
 
       - name: Download built wheels

.github/workflows/tests.yml

@@ -41,10 +41,10 @@ jobs:
           submodules: "recursive"
           fetch-depth: 1
 
-      - name: Set up Python 3.7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v4
         with:
-          python-version: "3.7" # the lowest version we support (sync with requires-python in pyproject.toml)
+          python-version: "3.8" # the lowest version we support (sync with requires-python in pyproject.toml)
           update-environment: true
 
       - name: Setup CUDA Toolkit
@@ -111,10 +111,10 @@ jobs:
           submodules: "recursive"
           fetch-depth: 1
 
-      - name: Set up Python 3.7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v4
         with:
-          python-version: "3.7" # the lowest version we support (sync with requires-python in pyproject.toml)
+          python-version: "3.8" # the lowest version we support (sync with requires-python in pyproject.toml)
           update-environment: true
 
       - name: Upgrade pip

.pre-commit-config.yaml

@@ -42,7 +42,7 @@ repos:
     rev: v3.3.1
     hooks:
       - id: pyupgrade
-        args: [--py37-plus] # sync with requires-python
+        args: [--py38-plus] # sync with requires-python
         stages: [commit, push, manual]
         exclude: |
           (?x)(

.pylintrc

@@ -84,7 +84,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.7  # the lowest version we support (sync with requires-python in pyproject.toml)
+py-version=3.8  # the lowest version we support (sync with requires-python in pyproject.toml)
 
 # Discover python modules and packages in the file system subtree.
 recursive=no

Makefile

@@ -61,11 +61,7 @@ pre-commit-install:
 
 docs-install:
 	$(call check_pip_install_extra,pydocstyle,pydocstyle[toml])
-	$(call check_pip_install_extra,doc8,"doc8<1.0.0a0")
-	if ! $(PYTHON) -c "import sys; exit(sys.version_info < (3, 8))"; then \
-		$(PYTHON) -m pip uninstall --yes importlib-metadata; \
-		$(call check_pip_install_extra,importlib-metadata,"importlib-metadata<5.0.0a0"); \
-	fi
+	$(call check_pip_install,doc8)
 	$(call check_pip_install,sphinx)
 	$(call check_pip_install,sphinx-rtd-theme)
 	$(call check_pip_install,sphinx-autoapi)
@@ -75,7 +71,7 @@ docs-install:
 	$(call check_pip_install,sphinxcontrib-bibtex)
 	$(call check_pip_install,sphinx-autodoc-typehints)
 	$(call check_pip_install,myst-nb)
-	$(call check_pip_install_extra,sphinxcontrib.spelling,sphinxcontrib.spelling pyenchant)
+	$(call check_pip_install_extra,sphinxcontrib-spelling,sphinxcontrib-spelling pyenchant)
 
 pytest-install:
 	$(call check_pip_install,pytest)

README.md

@@ -8,7 +8,7 @@
 
 <div align="center">
 
-  <a>![Python 3.7+](https://img.shields.io/badge/Python-3.7%2B-brightgreen.svg)</a>
+  <a>![Python 3.8+](https://img.shields.io/badge/Python-3.8%2B-brightgreen.svg)</a>
   <a href="https://pypi.org/project/torchopt">![PyPI](https://img.shields.io/pypi/v/torchopt?logo=pypi)</a>
   <a href="https://github.com/metaopt/torchopt/tree/HEAD/tests">![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/metaopt/torchopt/tests.yml?label=tests&logo=github)</a>
   <a href="https://codecov.io/gh/metaopt/torchopt">![CodeCov](https://img.shields.io/codecov/c/gh/metaopt/torchopt)</a>

conda-recipe.yaml

@@ -90,7 +90,7 @@ dependencies:
   - mypy >= 0.990
   - flake8
   - flake8-bugbear
-  - doc8 < 1.0.0a0
+  - doc8
   - pydocstyle
   - clang-format >= 14
   - clang-tools >= 14  # clang-tidy

docs/source/developer/contributing.rst

@@ -102,9 +102,9 @@ For example, the following command will build a wheel for Python 3.7:
 
 .. code-block:: bash
 
-    CIBW_BUILD="cp37*manylinux*" python3 -m cibuildwheel --platform=linux --output-dir=wheelhouse --config-file=pyproject.toml
+    CIBW_BUILD="cp38*manylinux*" python3 -m cibuildwheel --platform=linux --output-dir=wheelhouse --config-file=pyproject.toml
 
-You can change ``cp37*`` to ``cp310*`` to build for Python 3.10. See https://cibuildwheel.readthedocs.io/en/stable/options for more options.
+You can change ``cp38*`` to ``cp310*`` to build for Python 3.10. See https://cibuildwheel.readthedocs.io/en/stable/options for more options.
 
 .. |cibuildwheel| replace:: ``cibuildwheel``
 .. _cibuildwheel: https://github.com/pypa/cibuildwheel

pyproject.toml

@@ -11,7 +11,7 @@ description = "An efficient library for differentiable optimization for PyTorch.
 readme = "README.md"
 # Change this if wheels for `torch` is available
 # Search "requires-python" and update all corresponding items
-requires-python = ">= 3.7"
+requires-python = ">= 3.8"
 authors = [
     { name = "TorchOpt Contributors" },
     { name = "Jie Ren", email = "jieren9806@gmail.com" },
@@ -34,7 +34,6 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     # Sync with requires-python
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
@@ -74,7 +73,7 @@ lint = [
     "mypy >= 0.990",
     "flake8",
     "flake8-bugbear",
-    "doc8 < 1.0.0a0",  # unpin this when we drop support for Python 3.7
+    "doc8",
     "pydocstyle[toml]",
     "pyenchant",
     "cpplint",
@@ -170,7 +169,7 @@ safe = true
 line-length = 100
 skip-string-normalization = true
 # Sync with requires-python
-target-version = ["py37", "py38", "py39", "py310", "py311"]
+target-version = ["py38", "py39", "py310", "py311"]
 
 [tool.isort]
 atomic = true
@@ -184,7 +183,7 @@ multi_line_output = 3
 
 [tool.mypy]
 # Sync with requires-python
-python_version = 3.7
+python_version = 3.8
 pretty = true
 show_error_codes = true
 show_error_context = true

tests/requirements.txt

@@ -16,8 +16,7 @@ pylint[spelling] >= 2.15.0
 mypy >= 0.990
 flake8
 flake8-bugbear
-# https://github.com/PyCQA/doc8/issues/112
-doc8 < 1.0.0a0
+doc8
 pydocstyle[toml]
 pyenchant
 cpplint

torchopt/base.py

@@ -35,8 +35,7 @@
 
 import itertools
 from abc import abstractmethod
-from typing import TYPE_CHECKING, Callable, NamedTuple
-from typing_extensions import Protocol  # Python 3.8+
+from typing import TYPE_CHECKING, Callable, NamedTuple, Protocol
 
 
 if TYPE_CHECKING:  # pragma: no cover

torchopt/diff/zero_order/decorator.py

@@ -17,8 +17,7 @@
 from __future__ import annotations
 
 import functools
-from typing import Any, Callable, Sequence
-from typing_extensions import Literal  # Python 3.8+
+from typing import Any, Callable, Literal, Sequence
 from typing_extensions import TypeAlias  # Python 3.10+
 
 import torch

torchopt/typing.py

@@ -15,9 +15,19 @@
 """Typing utilities."""
 
 import abc
-from typing import Callable, Dict, List, Optional, Sequence, Tuple, TypeVar, Union
+from typing import (
+    Callable,
+    Dict,
+    List,
+    Optional,
+    Protocol,
+    Sequence,
+    Tuple,
+    TypeVar,
+    Union,
+    runtime_checkable,
+)
 from typing_extensions import TypeAlias  # Python 3.10+
-from typing_extensions import Protocol, runtime_checkable  # Python 3.8+
 
 import torch
 import torch.distributed.rpc as rpc

torchopt/utils.py

@@ -18,8 +18,7 @@
 
 import copy
 import itertools
-from typing import TYPE_CHECKING, NamedTuple, Sequence, cast, overload
-from typing_extensions import Literal  # Python 3.8+
+from typing import TYPE_CHECKING, Literal, NamedTuple, Sequence, cast, overload
 from typing_extensions import TypeAlias  # Python 3.10+
 
 import torch