test: python 3.12 (#225)

* test: add 3.12

* ci: install numpy from github

* chore: remove numpy intsall from github

* test: try skip checking msgspec

* build: add classifier

.github/workflows/test.yml

@@ -51,6 +51,9 @@ jobs:
           - platform: windows-latest
             python-version: "3.11"
             pydantic: "pydantic<2"
+          - platform: ubuntu-latest
+            python-version: "3.12-dev"
+            backend: ""
 
     steps:
       - uses: actions/checkout@v4
@@ -61,11 +64,12 @@ jobs:
 
       - uses: tlambert03/[email protected]
         if: matrix.backend != ''
+
       - name: Install ${{ matrix.backend }}
+        if: matrix.backend != ''
         run: |
           python -m pip install -e .[testqt]
           python -m pip install ${{ matrix.backend }}
-        if: matrix.backend != ''
 
       - name: install
         run: |

pyproject.toml

@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Typing :: Typed",
 ]
 dynamic = ["version"]

tests/test_dataclass_utils.py

@@ -7,8 +7,8 @@
 
 try:
     from msgspec import Struct
-except ImportError:
-    Struct = None
+except (ImportError, TypeError):  # type error on python 3.12-dev
+    Struct = None  # type: ignore [assignment,misc]
 
 try:
     from pydantic import __version__ as pydantic_version