mypy to astral ty

.github/workflows/typing.yaml

@@ -13,9 +13,11 @@ env:
   DEFAULT_PYTHON: "3.13"
 
 jobs:
-  mypy:
-    name: mypy
+  ty:
+    name: ty
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
       - name: ⤵️ Check out code from GitHub
         uses: actions/checkout@v6.0.1
@@ -30,5 +32,5 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: 🏗 Install dependencies
         run: uv sync --dev
-      - name: 🚀 Run mypy
-        run: uv run mypy examples src tests
+      - name: 🚀 Run ty
+        run: uv run ty check examples src tests

.pre-commit-config.yaml

@@ -83,11 +83,11 @@ repos:
         types: [text]
         entry: uv run end-of-file-fixer
         stages: [pre-commit, pre-push, manual]
-      - id: mypy
-        name: 🆎 Static type checking using mypy
+      - id: ty
+        name: 🆎 Static type checking using ty
         language: system
         types: [python]
-        entry: uv run mypy
+        entry: uv run ty check
         require_serial: true
       - id: no-commit-to-branch
         name: 🛑 Don't commit to main branch

pyproject.toml

@@ -189,7 +189,7 @@ dev = [
     # hatch is required to support type hinting and proper packaging of the py.typed file.
     "hatch>=1.14.1",
     "isort==6.1.0",
-    "mypy==1.19.0",
+    "ty==0.0.5",
     "pre-commit==4.5.0",
     "pre-commit-hooks==6.0.0",
     "pylint==3.3.9",

src/bsblan/utility.py

@@ -5,10 +5,7 @@
 import logging
 import re
 from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, Any
-
-if TYPE_CHECKING:
-    from constants import APIConfig
+from typing import Any
 
 logger = logging.getLogger(__name__)
 
@@ -76,7 +73,8 @@ def validate_time_format(
 class APIValidator:
     """Validates and maintains BSB-LAN API configuration."""
 
-    api_config: APIConfig
+    # Flexible type for API data (accepts `APIConfig`, plain dicts, or None)
+    api_config: Any  # intentionally permissive to support tests and dynamic data
     validated_sections: set[str] = field(default_factory=set)
 
     def validate_section(self, section: str, request_data: dict[str, Any]) -> None:
@@ -89,7 +87,7 @@ def validate_section(self, section: str, request_data: dict[str, Any]) -> None:
 
         """
         # Check if the section exists in the APIConfig object
-        if section not in self.api_config:
+        if not self.api_config or section not in self.api_config:
             logger.warning("Unknown section '%s' in API configuration", section)
             return
 
@@ -141,7 +139,7 @@ def _is_valid_param(self, param: dict[str, Any]) -> bool:
 
     def get_section_params(self, section: str) -> Any:
         """Get the parameter mapping for a section."""
-        return self.api_config.get(section, {}).copy()
+        return (self.api_config or {}).get(section, {}).copy()
 
     def is_section_validated(self, section: str) -> bool:
         """Check if a section has been validated."""

tests/test_thermostat.py

@@ -7,10 +7,12 @@
 
 import json
 import logging
+from collections.abc import Awaitable, Callable
 from typing import TYPE_CHECKING, Any
 
 import aiohttp
 import pytest
+from aiohttp.web_request import Request
 from aresponses import Response, ResponsesMockServer
 
 from bsblan import BSBLAN, BSBLANConfig
@@ -21,7 +23,13 @@
 )
 
 if TYPE_CHECKING:
-    from collections.abc import AsyncGenerator
+    from collections.abc import (
+        AsyncGenerator,
+        Awaitable,
+        Callable,
+    )
+
+    from aiohttp.web_request import Request
 
 logger = logging.getLogger(__name__)
 
@@ -59,10 +67,12 @@ async def mock_aresponses() -> AsyncGenerator[ResponsesMockServer, None]:
         yield server
 
 
-def create_response_handler(expected_data: dict[str, Any]) -> Response:
+def create_response_handler(
+    expected_data: dict[str, Any],
+) -> Callable[[Request], Awaitable[Response]]:
     """Create a response handler that checks the request data."""
 
-    async def response_handler(request: aiohttp.web.Request) -> Response:
+    async def response_handler(request: Request) -> Response:
         """Check the request data."""
         assert request.method == "POST"
         assert request.host == "example.com"