Fix clientwide mypy errors

.github/workflows/main.yaml

@@ -14,8 +14,8 @@ on:
   pull_request:
 
 jobs:
-  lint-and_format:
-    name: Run linter and formatter
+  lint-and-format:
+    name: Run Linter and Formatter
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -34,6 +34,24 @@ jobs:
           python -m build
           python -m twine check dist/*
 
+  type-checking:
+    name: Run Type Checking
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ["3.8", "3.9", "3.10", "3.11"]
+        folder: ["weaviate"]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+          cache: 'pip' # caching pip dependencies
+      - run: pip install -r requirements-devel.txt
+      - name: Run mypy
+        run: mypy --python-version ${{matrix.version}} ${{ matrix.folder }}
+
   unit-tests:
     name: Run Unit Tests
     runs-on: ubuntu-latest
@@ -43,20 +61,20 @@ jobs:
         version: ["3.8", "3.9", "3.10", "3.11"]
         folder: ["test", "mock_tests"]
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.version }}
-        cache: 'pip' # caching pip dependencies
-    - run: pip install -r requirements-devel.txt
-    - name: Run unittests
-      run: pytest --cov -v --cov-report=term-missing --cov=weaviate --cov-report xml:coverage-${{ matrix.folder }}.xml ${{ matrix.folder }}
-    - name: Archive code coverage results
-      if: matrix.version == '3.10' && (github.ref_name != 'main')
-      uses: actions/upload-artifact@v3
-      with:
-        name: coverage-report-${{ matrix.folder }}
-        path: coverage-${{ matrix.folder }}.xml
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.version }}
+          cache: 'pip' # caching pip dependencies
+      - run: pip install -r requirements-devel.txt
+      - name: Run unittests
+        run: pytest --cov -v --cov-report=term-missing --cov=weaviate --cov-report xml:coverage-${{ matrix.folder }}.xml ${{ matrix.folder }}
+      - name: Archive code coverage results
+        if: matrix.version == '3.10' && (github.ref_name != 'main')
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage-report-${{ matrix.folder }}
+          path: coverage-${{ matrix.folder }}.xml
 
   integration-tests:
     name: Run Integration Tests
@@ -185,7 +203,7 @@ jobs:
 
   build-and-publish:
     name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
-    needs: [integration-tests, unit-tests, lint-and_format, test-package]
+    needs: [integration-tests, unit-tests, lint-and-format, type-checking, test-package]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.pre-commit-config.yaml

@@ -19,4 +19,16 @@ repos:
         'flake8-bugbear==22.10.27',
         'flake8-comprehensions==3.10.1',
         'flake8-builtins==2.0.1'
+      ]
+
+-   repo: https://github.com/pre-commit/mirrors-mypy
+    rev: "v1.5.1"
+    hooks:
+    - id: mypy
+      entry: mypy ./weaviate
+      pass_filenames: false
+      additional_dependencies: [
+        'types-requests==2.31.0.2',
+        'types-urllib3==1.26.25.14',
+        'typing_extensions==4.7.1',
       ]

pyproject.toml

@@ -34,6 +34,10 @@ warn_return_any = true
 warn_unused_ignores = true
 exclude = ["weaviate_grpc", "docs", "mock_tests", "test", "integration"]
 
+[[tool.mypy.overrides]]
+module = "weaviate_grpc.*"
+ignore_errors = true
+
 [[tool.mypy.overrides]]
 module = "grpc.*"
 ignore_missing_imports = true

requirements-devel.txt

@@ -20,6 +20,13 @@ coverage==7.3.0
 werkzeug>=2.3.7
 pytest-httpserver>=1.0.8
 
+mypy>=1.5.1<2.0.0
+mypy-extensions==1.0.0
+tomli>=2.0.1<3.0.0
+types-requests>=2.31.0.2<3.0.0
+types-urllib3>=1.26.25.14<2.0.0
+typing_extensions>=4.7.1<5.0.0
+
 pre-commit
 
 flake8

test/gql/test_query.py

@@ -35,7 +35,7 @@ def test_raw(self):
         """
 
         # valid calls
-        connection_mock = mock_connection_func("post")
+        connection_mock = mock_connection_func("post", return_json={})
         query = Query(connection_mock)
 
         gql_query = "{Get {Group {name Members {... on Person {name}}}}}"

weaviate/backup/backup.py

@@ -118,6 +118,7 @@ def create(
             ) from conn_err
 
         create_status = _decode_json_response_dict(response, "Backup creation")
+        assert create_status is not None
         if wait_for_completion:
             while True:
                 status: dict = self.get_create_status(
@@ -246,7 +247,7 @@ def restore(
                 "Backup restore failed due to connection error."
             ) from conn_err
         restore_status = _decode_json_response_dict(response, "Backup restore")
-
+        assert restore_status is not None
         if wait_for_completion:
             while True:
                 status: dict = self.get_restore_status(