ci: Add mypy for static type checking

Author: daniel-jones-dev

.gitlab-ci.yml

@@ -117,6 +117,21 @@ secret_detection:
   rules:
     - if: $CI_MERGE_REQUEST_ID
 
+.mypy_base:
+  stage: check
+  script: poetry run mypy --exclude 'examples/' .
+
+mypy_scheduled:
+  extends: .mypy_base
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "schedule"
+  retry: 2
+
+mypy_manual:
+  extends: .mypy_base
+  rules:
+    - if: $CI_PIPELINE_SOURCE != "schedule"
+
 # stage: build ----------------------
 
 package:

deepl/http_client.py

@@ -7,7 +7,7 @@
 import http
 import platform
 import random
-import requests
+import requests  # type: ignore
 import traceback
 import time
 from functools import lru_cache

deepl/translator.py

@@ -28,7 +28,7 @@
 import json as json_module
 import os
 import pathlib
-import requests
+import requests  # type: ignore
 import time
 from typing import (
     Any,
@@ -765,6 +765,8 @@ def translate_document_download(
         # TODO: once we drop py3.6 support, replace this with @overload
         # annotations in `_api_call` and chained private functions.
         # See for example https://stackoverflow.com/a/74070166/4926599
+        # In addition, drop the type: ignore annotation on the
+        # `import requests` / `from requests`
         assert isinstance(response, requests.Response)
 
         self._raise_for_status(