Add Mypy?

Pipfile

@@ -7,6 +7,7 @@ verify_ssl = true
 check-manifest = ">=0.25"
 pre-commit = "*"
 pytest-invenio = "*"
+pytest-mypy = "*"
 
 [packages]
 ic-data-repo = {editable=true, path="./site"}

pyproject.toml

@@ -8,3 +8,20 @@ docstring-convention = "google"
 line_length = 88
 multi_line_output = 3
 include_trailing_comma = true
+
+[tool.mypy]
+disallow_any_generics = true
+warn_unreachable = true
+warn_unused_ignores = true
+
+[[tool.mypy.overrides]]
+module = [
+       "flask_oauthlib.*",
+       "invenio_app.*",
+       "invenio_assets.*",
+       "invenio_oauthclient.*",
+       ]
+ignore_missing_imports = true
+
+[tool.pytest.ini_options]
+addopts = "--mypy --ignore=site/setup.py"

site/ic_data_repo/auth/oauth.py

@@ -1,11 +1,16 @@
 """Implement OAuth handlers."""
 
+from typing import Any
+
 import jwt
 import requests
 from flask import current_app
+from flask_oauthlib import OAuthRemote
 
 
-def info_handler(remote_app, response_data):
+def info_handler(
+    remote_app: OAuthRemote, response_data: dict[str, Any]
+) -> dict[str, Any]:
     """Extract account info from authorisation response.
 
     Extracts and validates the id_token returned as part of the OIDC workflow using