min version 3.9

.github/workflows/python-tests.yml

@@ -18,12 +18,12 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
         include:
           - os: windows-latest
             python-version: "3.9"
           - os: ubuntu-latest
-            python-version: "pypy-3.8"
+            python-version: "pypy-3.9"
           - os: ubuntu-latest
             python-version: "3.10"
           - os: macos-latest

jupyter_events/schema.py

@@ -3,7 +3,7 @@
 
 import json
 from pathlib import Path, PurePath
-from typing import Any, Dict, Union
+from typing import Any, Union
 
 from jsonschema import FormatChecker, validators
 from referencing import Registry
@@ -30,7 +30,7 @@ class EventSchemaFileAbsent(Exception):
     """An error for an absent event schema file."""
 
 
-SchemaType = Union[Dict[str, Any], str, PurePath]
+SchemaType = Union[dict[str, Any], str, PurePath]
 
 
 class EventSchema:

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 name = "jupyter-events"
 description = "Jupyter Event System library"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
     { name = "Jupyter Development Team", email = "[email protected]" },
 ]
@@ -150,7 +150,7 @@ source = ["jupyter_events"]
 
 [tool.mypy]
 files = "jupyter_events"
-python_version = "3.8"
+python_version = "3.9"
 strict = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 warn_unreachable = true