chore: drop Python 3.7

Signed-off-by: Henry Schreiner <[email protected]>

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, windows-latest, macos-13]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         include:
           - os: macos-14
             python-version: "3.12"
@@ -32,7 +32,6 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Setup uv
         uses: yezz123/setup-uv@v4
-        if: matrix.python-version != '3.7'
       - name: Set up Miniconda
         uses: conda-incubator/setup-miniconda@v3
         with:
@@ -41,16 +40,11 @@ jobs:
           miniforge-variant: Mambaforge
           use-mamba: true
       - name: Install Nox-under-test (uv)
-        if: matrix.python-version != '3.7'
         run:  uv pip install --system .
-      - name: Install Nox-under-test (pip)
-        if: matrix.python-version == '3.7'
-        run: python -m pip install --disable-pip-version-check .
       - name: Run tests on ${{ matrix.os }} (tox <4)
         run: nox --non-interactive --error-on-missing-interpreter --session "tests(python='${{ matrix.python-version }}', tox_version='<4')" -- --full-trace
       - name: Run tox-to-nox tests on ${{ matrix.os }} (tox latest)
         run: nox --non-interactive --error-on-missing-interpreter --session "tests(python='${{ matrix.python-version }}', tox_version='latest')" -- tests/test_tox_to_nox.py --full-trace
-        if: matrix.python-version != '3.7'
       - name: Save coverage report
         uses: actions/upload-artifact@v4
         with:
@@ -62,10 +56,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - name: Setup uv
         uses: yezz123/setup-uv@v4
       - name: Install Nox-under-test
@@ -84,10 +78,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.9
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: "3.12"
       - name: Install Nox-under-test
         run: python -m pip install --disable-pip-version-check .
       - name: Lint
@@ -96,10 +90,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.9
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: "3.12"
       - name: Setup uv
         uses: yezz123/setup-uv@v4
       - name: Install Nox-under-test

action.yml

@@ -15,7 +15,7 @@ runs:
     - uses: actions/setup-python@v5
       id: localpython
       with:
-        python-version: "3.7 - 3.12"
+        python-version: "3.8 - 3.12"
         update-environment: false
 
     - name: "Validate input"

docs/conf.py

@@ -15,11 +15,7 @@
 
 import os
 import sys
-
-if sys.version_info >= (3, 8):
-    from importlib import metadata
-else:
-    import importlib_metadata as metadata
+from importlib import metadata
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the

nox/_options.py

@@ -20,19 +20,14 @@
 import os
 import sys
 from collections.abc import Iterable
-from typing import Any, Callable, Sequence
+from typing import Any, Callable, Literal, Sequence
 
 import argcomplete
 
 from nox import _option_set
 from nox.tasks import discover_manifest, filter_manifest, load_nox_module
 from nox.virtualenv import ALL_VENVS
 
-if sys.version_info < (3, 8):
-    from typing_extensions import Literal
-else:
-    from typing import Literal
-
 ReuseVenvType = Literal["no", "yes", "never", "always"]
 
 """All of Nox's configuration options."""

nox/_version.py

@@ -16,16 +16,11 @@
 
 import ast
 import contextlib
-import sys
+from importlib import metadata
 
 from packaging.specifiers import InvalidSpecifier, SpecifierSet
 from packaging.version import InvalidVersion, Version
 
-if sys.version_info >= (3, 8):
-    from importlib import metadata
-else:
-    import importlib_metadata as metadata
-
 
 class VersionCheckFailed(Exception):
     """The Nox version does not satisfy what ``nox.needs_version`` specifies."""
@@ -42,10 +37,7 @@ def get_nox_version() -> str:
 
 def _parse_string_constant(node: ast.AST) -> str | None:  # pragma: no cover
     """Return the value of a string constant."""
-    if sys.version_info < (3, 8):
-        if isinstance(node, ast.Str) and isinstance(node.s, str):
-            return node.s
-    elif isinstance(node, ast.Constant) and isinstance(node.value, str):
+    if isinstance(node, ast.Constant) and isinstance(node.value, str):
         return node.value
     return None
 

nox/command.py

@@ -20,15 +20,11 @@
 import subprocess
 import sys
 from collections.abc import Iterable, Mapping, Sequence
+from typing import Literal
 
 from nox.logger import logger
 from nox.popen import DEFAULT_INTERRUPT_TIMEOUT, DEFAULT_TERMINATE_TIMEOUT, popen
 
-if sys.version_info < (3, 8):
-    from typing_extensions import Literal
-else:
-    from typing import Literal
-
 TYPE_CHECKING = False
 
 if TYPE_CHECKING:

nox/tox_to_nox.py

@@ -20,20 +20,15 @@
 import os
 import pkgutil
 import re
-import sys
 from configparser import ConfigParser
+from importlib import metadata
 from pathlib import Path
 from subprocess import check_output
 from typing import Any, Iterable
 
 import jinja2
 import tox.config
 
-if sys.version_info < (3, 8):
-    import importlib_metadata as metadata
-else:
-    from importlib import metadata
-
 TOX_VERSION = metadata.version("tox")
 
 TOX4 = int(TOX_VERSION.split(".")[0]) >= 4

noxfile.py

@@ -40,17 +40,13 @@
     nox.options.sessions.append("micromamba_tests")
 
 
-# Because there is a dependency conflict between argcomplete and the latest tox
-# (both depend on a different version of importlibmetadata for Py 3.7) pip
-# installs tox 3 as the latest one for Py 3.7.
 @nox.session
 @nox.parametrize(
     "python, tox_version",
     [
         (python, tox_version)
-        for python in ("3.7", "3.8", "3.9", "3.10", "3.11", "3.12")
+        for python in ("3.8", "3.9", "3.10", "3.11", "3.12")
         for tox_version in ("latest", "<4")
-        if (python, tox_version) != ("3.7", "latest")
     ],
 )
 def tests(session: nox.Session, tox_version: str) -> None:
@@ -125,7 +121,7 @@ def cover(session: nox.Session) -> None:
     session.run("coverage", "erase")
 
 
-@nox.session(python="3.9")
+@nox.session(python="3.12")
 def lint(session: nox.Session) -> None:
     """Run pre-commit linting."""
     session.install("pre-commit")
@@ -202,13 +198,11 @@ def github_actions_default_tests(session: nox.Session) -> None:
 
 @nox.session(
     python=[
-        "3.7",
         "3.8",
         "3.9",
         "3.10",
         "3.11",
         "3.12",
-        "pypy3.7",
         "pypy3.8",
         "pypy3.9",
         "pypy3.10",

pyproject.toml

@@ -19,7 +19,7 @@ authors = [
   { name = "Alethea Katherine Flowers" },
   { email = "[email protected]" },
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Environment :: Console",
@@ -31,7 +31,6 @@ classifiers = [
   "Operating System :: Unix",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
@@ -42,10 +41,8 @@ classifiers = [
 dependencies = [
   "argcomplete<4.0,>=1.9.4",
   "colorlog<7.0.0,>=2.6.1",
-  'importlib-metadata; python_version < "3.8"',
   "packaging>=20.9",
   'tomli>=1; python_version < "3.11"',
-  'typing-extensions>=3.7.4; python_version < "3.8"',
   "virtualenv>=20.14.1",
 ]
 [project.optional-dependencies]
@@ -112,7 +109,7 @@ exclude_also = [ "def __dir__()", "if TYPE_CHECKING:", "@overload" ]
 
 [tool.mypy]
 files = [ "nox/**/*.py", "noxfile.py" ]
-python_version = "3.7"
+python_version = "3.8"
 strict = true
 warn_unreachable = true
 enable_error_code = [ "ignore-without-code", "redundant-expr", "truthy-bool" ]

tests/test_main.py

@@ -17,6 +17,7 @@
 import contextlib
 import os
 import sys
+from importlib import metadata
 from pathlib import Path
 from unittest import mock
 
@@ -28,12 +29,6 @@
 import nox.registry
 import nox.sessions
 
-if sys.version_info >= (3, 8):
-    from importlib import metadata
-else:
-    import importlib_metadata as metadata
-
-
 RESOURCES = os.path.join(os.path.dirname(__file__), "resources")
 VERSION = metadata.version("nox")
 

tests/test_virtualenv.py

@@ -21,6 +21,7 @@
 import subprocess
 import sys
 import types
+from importlib import metadata
 from pathlib import Path
 from textwrap import dedent
 from typing import NamedTuple
@@ -31,11 +32,6 @@
 
 import nox.virtualenv
 
-if sys.version_info < (3, 8):
-    import importlib_metadata as metadata
-else:
-    from importlib import metadata
-
 IS_WINDOWS = nox.virtualenv._SYSTEM == "Windows"
 HAS_CONDA = shutil.which("conda") is not None
 HAS_UV = shutil.which("uv") is not None
@@ -497,8 +493,7 @@ def test_micromamba_environment(make_one, monkeypatch):
     monkeypatch.setattr(nox.command, "run", run)
     venv.create()
     run.assert_called_once()
-    # .args requires Python 3.8+
-    ((args,), _) = run.call_args
+    (args,) = run.call_args.args
     assert args[0] == "micromamba"
     assert "--channel=conda-forge" in args
 
@@ -521,8 +516,7 @@ def test_micromamba_channel_environment(make_one, monkeypatch, params):
     venv.venv_params = params
     venv.create()
     run.assert_called_once()
-    # .args requires Python 3.8+
-    ((args,), _) = run.call_args
+    (args,) = run.call_args.args
     assert args[0] == "micromamba"
     for p in params:
         assert p in args