ci: Use UV_PYTHON to set python version in tests

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
           sed -i '' 's/\[tool.hatch.build.hooks.\(.*\)\]/\[_tool.hatch.build.hooks.\1\]/' pyproject.toml
       - uses: astral-sh/setup-uv@v3
         with:
-          version: "0.4.16"
+          version: "0.4.x"
       - run: |
           uv run ruff check
           uv run ruff format
@@ -39,7 +39,7 @@ jobs:
           sed -i '' 's/\[tool.hatch.build.hooks.\(.*\)\]/\[_tool.hatch.build.hooks.\1\]/' pyproject.toml
       - uses: astral-sh/setup-uv@v3
         with:
-          version: "0.4.16"
+          version: "0.4.x"
       - run: uv run mypy
 
   TestPython:
@@ -55,17 +55,16 @@ jobs:
           - "3.12"
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version-file: ".python-version"
       - uses: pnpm/action-setup@v4
         with:
           run_install: true
       - uses: astral-sh/setup-uv@v3
         with:
-          version: "0.4.16"
+          version: "0.4.x"
       - name: Run tests
         run: uv run --with pytest-cov pytest ./tests --color=yes --cov anywidget --cov-report xml
+        env:
+          UV_PYTHON: ${{ matrix.python-version }}
       - uses: codecov/codecov-action@v4
 
   LintJavaScript:

.github/workflows/release.yml

@@ -27,7 +27,7 @@ jobs:
           run_install: true
       - uses: astral-sh/setup-uv@v3
         with:
-          version: "0.4.16"
+          version: "0.4.x"
       - name: Create Release Pull Request or Publish
         id: changesets
         uses: changesets/action@v1

.python-version

@@ -1 +1 @@
-3.11
+3.12

pyproject.toml

@@ -5,14 +5,12 @@ build-backend = "hatchling.build"
 [project]
 name = "anywidget"
 description = "custom jupyter widgets made easy"
-authors = [
-    { name = "Trevor Manz", email = "[email protected]" }
-]
+authors = [{ name = "Trevor Manz", email = "[email protected]" }]
 license = { text = "MIT" }
 dynamic = ["version"]
 readme = "README.md"
 requires-python = ">=3.8"
-dependencies =  [
+dependencies = [
     "ipywidgets>=7.6.0",
     "typing-extensions>=4.2.0",
     "psygnal>=0.8.1",
@@ -69,9 +67,7 @@ skip-if-exists = [
     "anywidget/nbextension/index.js",
     "anywidget/labextension/package.json",
 ]
-dependencies = [
-    "hatch-jupyter-builder>=0.5.0",
-]
+dependencies = ["hatch-jupyter-builder>=0.5.0"]
 
 [tool.hatch.build.hooks.jupyter-builder.build-kwargs]
 npm = "pnpm"
@@ -91,20 +87,24 @@ exclude = ["packages", "docs"]
 pydocstyle = { convention = "numpy" }
 select = ["ALL"]
 ignore = [
-    "D401", # First line should be in imperative mood (remove to opt in)
+    "D401",   # First line should be in imperative mood (remove to opt in)
     "COM812", # Missing trailing comma (conflicts with ruff format)
     "ISC001", # Import sorting (conflicts with ruff format)
     "FIX002", # Fixable issue
     "DOC201", # TODO(manzt) enable in follow-up PR; no doc for return type.
-    "FBT", # TODO(manzt): enable in follow-up PR; require bool options to be keyword-only.
+    "FBT",    # TODO(manzt): enable in follow-up PR; require bool options to be keyword-only.
 ]
 
 [tool.ruff.lint.per-file-ignores]
 "tests/*.py" = [
-    "D",    # No docstrings in tests
-    "S101", # Use of assert
-    "B018", # "useless expression", for accessing the Foo._repr_mimbundle_ descriptor
+    "D",      # No docstrings in tests
+    "S101",   # Use of assert
+    "B018",   # "useless expression", for accessing the Foo._repr_mimbundle_ descriptor
     "SLF001", # Access private member
+    "PLC2701" # Private imports
+]
+"tests/test_descriptor.py" = [
+    "FA100" # Don't add 'from __future__ import annotations' because it messes with Pydantic and ClassVar
 ]
 "docs/*.py" = ["D"]
 
@@ -131,7 +131,7 @@ exclude_lines = [
     "@overload",
     "except ImportError",
     "\\.\\.\\.",
-    "raise NotImplementedError()"
+    "raise NotImplementedError()",
 ]
 
 # https://mypy.readthedocs.io/en/stable/config_file.html
@@ -144,11 +144,11 @@ enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 warn_unreachable = true
 
 [[tool.mypy.overrides]]
-module = "anywidget.widget"  # makes heavy use of traitlets, which is not typed
+module = "anywidget.widget"    # makes heavy use of traitlets, which is not typed
 disallow_untyped_calls = false
 
 [[tool.mypy.overrides]]
-module = "anywidget._cellmagic"  # makes heavy use of IPython, which is not typed
+module = "anywidget._cellmagic" # makes heavy use of IPython, which is not typed
 disallow_untyped_calls = false
 
 [[tool.mypy.overrides]]

tests/test_descriptor.py

@@ -1,9 +1,8 @@
-from __future__ import annotations
-
+import pathlib
 import time
 import weakref
 from dataclasses import dataclass
-from typing import TYPE_CHECKING, Callable, ClassVar, Generator
+from typing import TYPE_CHECKING, Callable, ClassVar, Generator, Set, Union
 from unittest.mock import MagicMock, patch
 
 import anywidget._descriptor
@@ -15,15 +14,11 @@
     ReprMimeBundle,
 )
 from anywidget._file_contents import FileContents
+from anywidget._protocols import AnywidgetProtocol
 from anywidget._util import _WIDGET_MIME_TYPE
+from ipykernel.comm import Comm
 from watchfiles import Change
 
-if TYPE_CHECKING:
-    import pathlib
-
-    from anywidget._protocols import AnywidgetProtocol
-    from ipykernel.comm import Comm
-
 
 class MockComm(MagicMock):
     # The only thing we need to do is to be able to relay messages back to
@@ -82,7 +77,7 @@ class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(autodetect_observer=False)
         value: int = val
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {"value": self.value}
 
         def __repr__(self) -> str:
@@ -122,7 +117,7 @@ def test_state_setter(mock_comm: MagicMock) -> None:
     class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(autodetect_observer=False)
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {}
 
         def _set_anywidget_state(self, state) -> None:  # noqa: ANN001
@@ -142,7 +137,7 @@ def test_state_setter_binary(mock_comm: MagicMock) -> None:
     class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(autodetect_observer=False)
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {}
 
         def _set_anywidget_state(self, state: dict) -> None:
@@ -168,7 +163,7 @@ def test_comm_cleanup() -> None:
     class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(autodetect_observer=False)
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {}
 
     foo = Foo()
@@ -192,7 +187,7 @@ def test_detect_observer() -> None:
     class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor()
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {}
 
     with pytest.warns(UserWarning, match="Could not find a notifier"):
@@ -208,7 +203,7 @@ class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(autodetect_observer=False)
         value: int = 1
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {"value": self.value}
 
     with pytest.warns(UserWarning, match=".*is not weakrefable"):
@@ -340,7 +335,7 @@ class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(_esm=esm, autodetect_observer=False)
         value: int = 1
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {"value": self.value}
 
     file_contents = Foo._repr_mimebundle_._extra_state["_esm"]
@@ -388,7 +383,7 @@ class Foo:
         _repr_mimebundle_ = MimeBundleDescriptor(bar=bar, autodetect_observer=False)
         value: int = 1
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {"value": self.value}
 
     file_contents = Foo._repr_mimebundle_._extra_state["bar"]
@@ -415,7 +410,7 @@ class Foo:
             autodetect_observer=False,
         )
 
-        def _get_anywidget_state(self, include: set[str] | None):  # noqa: ANN202, ARG002
+        def _get_anywidget_state(self, include: Union[Set[str], None]):  # noqa: ANN202, ARG002
             return {}
 
     foo = Foo()