Set 3.9 as base version, fix 3.12 compatibility

3.7 shouldn't be tested (in tox), fix the spelling on python_requires in
setup.cfg, pull in importlib_metadata for Python 3.9, and fix the
entry_points deprecation in Python 3.12.

.github/workflows/test.yml

@@ -24,6 +24,9 @@ jobs:
           - os: ubuntu-22.04
             python: "3.11"
             experimental: false
+          - os: ubuntu-22.04
+            python: "3.12"
+            experimental: false
 
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.experimental }}

gpiozero/devices.py

@@ -16,7 +16,12 @@
 from collections import namedtuple
 from itertools import chain
 from types import FunctionType
-from importlib.metadata import entry_points
+
+# NOTE: Remove try when compatibility moves beyond Python 3.10
+try:
+    from importlib_metadata import entry_points
+except ImportError:
+    from importlib.metadata import entry_points
 
 from .threads import _threads_shutdown
 from .mixins import (
@@ -303,8 +308,7 @@ def _default_pin_factory():
             with warnings.catch_warnings():
                 # The dict interface of entry_points is deprecated ... already
                 # and this deprecation is for us to worry about, not our users
-                warnings.simplefilter('ignore', category=DeprecationWarning)
-                group = entry_points()['gpiozero_pin_factories']
+                group = entry_points(group='gpiozero_pin_factories')
             for ep in group:
                 if ep.name == name:
                     return ep.load()()

gpiozero/pins/mock.py

@@ -13,7 +13,12 @@
 from time import time, sleep, monotonic
 from threading import Thread, Event
 from math import isclose
-from importlib.metadata import entry_points
+
+# NOTE: Remove try when compatibility moves beyond Python 3.10
+try:
+    from importlib_metadata import entry_points
+except ImportError:
+    from importlib.metadata import entry_points
 
 from ..exc import (
     PinPWMUnsupported,
@@ -463,7 +468,7 @@ def __init__(self, revision=None, pin_class=None):
         if isinstance(pin_class, bytes):
             pin_class = pin_class.decode('ascii')
         if isinstance(pin_class, str):
-            group = entry_points()['gpiozero_mock_pin_classes']
+            group = entry_points(group='gpiozero_mock_pin_classes')
             pin_class = group[pin_class.lower()].load()
         if not issubclass(pin_class, MockPin):
             raise ValueError(f'invalid mock pin_class: {pin_class!r}')

setup.cfg

@@ -19,18 +19,18 @@ classifiers =
     Topic :: Education
     Topic :: System :: Hardware
     License :: OSI Approved :: BSD License
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Programming Language :: Python :: Implementation :: PyPy
 
 [options]
 packages = find:
-python_requres = >=3.9
+python_requires = >=3.9
 install_requires =
     colorzero
+    importlib_metadata~=4.6;python_version<'3.10'
 
 [options.package_data]
 gpiozero =

tests/test_real_pins.py

@@ -14,7 +14,12 @@
 from time import time, sleep
 from math import isclose
 from unittest import mock
-from importlib.metadata import entry_points
+
+# NOTE: Remove try when compatibility moves beyond Python 3.10
+try:
+    from importlib_metadata import entry_points
+except ImportError:
+    from importlib.metadata import entry_points
 
 import pytest
 
@@ -52,11 +57,9 @@ def local_hardware_spi_only(intf):
 
 
 with warnings.catch_warnings():
-    # The dict interface of entry_points is deprecated ... already
-    warnings.simplefilter('ignore', category=DeprecationWarning)
     @pytest.fixture(
         scope='module',
-        params=[ep.name for ep in entry_points()['gpiozero_pin_factories']])
+        params=[ep.name for ep in entry_points(group='gpiozero_pin_factories')])
     def pin_factory_name(request):
         return request.param
 
@@ -65,9 +68,7 @@ def pin_factory_name(request):
 def pin_factory(request, pin_factory_name):
     try:
         with warnings.catch_warnings():
-            # The dict interface of entry_points is deprecated ... already
-            warnings.simplefilter('ignore', category=DeprecationWarning)
-            eps = entry_points()['gpiozero_pin_factories']
+            eps = entry_points(group='gpiozero_pin_factories')
         for ep in eps:
             if ep.name == pin_factory_name:
                 factory = ep.load()()
@@ -280,7 +281,7 @@ def test_envvar_factory(no_default_factory, pin_factory_name):
             pin_factory_name=pin_factory_name, e=e))
     else:
         try:
-            group = entry_points()['gpiozero_pin_factories']
+            group = entry_points(group='gpiozero_pin_factories')
             for ep in group:
                 if ep.name == pin_factory_name:
                     factory_class = ep.load()

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = {py35,py36,py37,py38,py39}
+envlist = {py39,py310,py311,py312}
 
 [testenv]
 deps = .[test]