Added Pyright checking and fixed problems it found

.github/workflows/test.yml

@@ -6,6 +6,23 @@ on:
   pull_request:
 
 jobs:
+  pyright:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.x
+    - uses: actions/cache@v4
+      with:
+        path: ~/.cache/pip
+        key: pip-pyright
+    - name: Install dependencies
+      run: pip install -e . pyright
+    - name: Run pyright
+      run: pyright --verifytypes asphalt.core
+
   test:
     strategy:
       fail-fast: false

pyproject.toml

@@ -113,6 +113,10 @@ commands = [["python", "-m", "pytest", { replace = "posargs", extend = true }]]
 package = "editable"
 extras = ["test"]
 
+[tool.tox.env.pyright]
+deps = ["pyright"]
+commands = [["pyright", "--verifytypes", "asphalt.core"]]
+
 [tool.tox.env.docs]
 commands = [["sphinx-build", "-n", "docs", "build/sphinx", { replace = "posargs", extend = true }]]
 extras = ["doc"]

src/asphalt/core/_context.py

@@ -147,7 +147,7 @@ class Context:
         resource has been published in this context
     """
 
-    resource_added = Signal(ResourceEvent)
+    resource_added: Signal[ResourceEvent] = Signal(ResourceEvent)
 
     _task_group: TaskGroup
     _reset_token: Token[Context]

src/asphalt/core/_utils.py

@@ -121,8 +121,8 @@ class PluginContainer:
     __slots__ = "namespace", "base_class", "_entrypoints", "_resolved"
 
     def __init__(self, namespace: str, base_class: type | None = None) -> None:
-        self.namespace = namespace
-        self.base_class = base_class
+        self.namespace: str = namespace
+        self.base_class: type | None = base_class
         group = entry_points(group=namespace)
         self._entrypoints = {ep.name: ep for ep in group}
         self._resolved: dict[str, Any] = {}