Checks/add-pyright

.github/workflows/checks.yml

@@ -10,6 +10,21 @@ jobs:
       - uses: actions/checkout@v5
       - uses: astral-sh/ruff-action@v3
 
+  pyright:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: astral-sh/setup-uv@v7
+        with:
+          activate-environment: true
+          python-version: "3.10"
+          enable-cache: true
+      - name: Test Pyright
+        run: |
+          uvx pyright
+      - name: Minimize uv cache
+        run: uv cache prune --ci
+
   link-check:
     runs-on: ubuntu-latest
     steps:

pyproject.toml

@@ -160,3 +160,21 @@ include = ["pyproject.toml", "README.rst", "LICENSE", "datasketch/**"]
 minversion = "6.0"
 addopts = ["--strict-markers", "--color=yes"]
 testpaths = ["test"]
+
+[tool.pyright]
+include = ["datasketch"]
+exclude = [
+  "benchmark",
+  "docs",
+  "examples",
+  "test",
+  "travis",
+  "**/.venv/**",
+  "**/__pycache__",
+]
+pythonVersion = "3.9"
+typeCheckingMode = "basic" # todo: change to "strict" in future
+
+reportMissingImports = true
+reportUnusedVariable = "warning"
+