Add mypy to CI and pre-commit hook

.github/workflows/mypy.yml

@@ -0,0 +1,26 @@
+name: Run mypy
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  OSX:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        python: ["3.10", 3.14]
+    steps:
+      - name: Checkout
+        uses: actions/[email protected]
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/[email protected]
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install mypy
+        run: |
+          pip install mypy
+      - name: Run mypy
+        run: |
+          mypy python
+

.mypy.ini

@@ -0,0 +1,17 @@
+[mypy]
+python_version = 3.10
+warn_return_any = False
+warn_unused_configs = True
+
+# Files to exclude
+exclude = (?x)(
+    python/lwt_interface/cython_example/setup.py|
+    python/lwt_interface/setup.py|
+    python/setup.py
+    )
+
+namespace_packages = False
+
+
+# Suppressing errors
+disable_error_code = assignment,attr-defined,index,empty-body,var-annotated,call-overload,syntax,union-attr,misc,import-not-found,import-untyped

.pre-commit-config.yaml

@@ -42,3 +42,11 @@ repos:
         args: [--skip-errors]
         additional_dependencies: [black==22.3.0]
         language_version: python3
+  - repo: local
+    hooks:
+    - id: mypy
+      name: mypy
+      language: system
+      entry: mypy
+      files: \.py$
+