feat: Verify basic typing using mypy

Author: l0b0

.pre-commit-config.yaml

@@ -26,6 +26,13 @@ repos:
             stages: [commit]
             types: [python]
 
+          - id: mypy
+            name: mypy
+            entry: mypy
+            language: system
+            stages: [commit]
+            types: [python]
+
           - id: pylint
             name: pylint
             entry: pylint

backend/endpoints/datasets/create.py

@@ -1,6 +1,6 @@
 """Create dataset function."""
 
-from jsonschema import ValidationError, validate
+from jsonschema import ValidationError, validate  # type: ignore
 
 from ..utils import error_response, success_response
 from .common import DATASET_TYPES

backend/endpoints/datasets/delete.py

@@ -1,6 +1,6 @@
 """Delete dataset function."""
 
-from jsonschema import ValidationError, validate
+from jsonschema import ValidationError, validate  # type: ignore
 from pynamodb.exceptions import DoesNotExist
 
 from ..utils import error_response, success_response

backend/endpoints/datasets/entrypoint.py

@@ -2,7 +2,7 @@
 Dataset endpoint Lambda function.
 """
 
-from jsonschema import ValidationError, validate
+from jsonschema import ValidationError, validate  # type: ignore
 
 from ..utils import error_response
 from .create import create_dataset

backend/endpoints/datasets/get.py

@@ -1,6 +1,6 @@
 """Get datasets functions."""
 
-from jsonschema import ValidationError, validate
+from jsonschema import ValidationError, validate  # type: ignore
 from pynamodb.exceptions import DoesNotExist
 
 from ..utils import error_response, success_response

backend/endpoints/datasets/update.py

@@ -1,6 +1,6 @@
 """Update dataset function."""
 
-from jsonschema import ValidationError, validate
+from jsonschema import ValidationError, validate  # type: ignore
 from pynamodb.exceptions import DoesNotExist
 
 from ..utils import error_response, success_response

infra/app.py

@@ -6,8 +6,8 @@
 
 import os
 
-from aws_cdk import core
-from datalake.datalake_stack import DataLakeStack  # pylint: disable=import-error
+from aws_cdk import core  # type: ignore
+from datalake.datalake_stack import DataLakeStack  # type: ignore # pylint: disable=import-error
 
 ENV = os.environ.get("DEPLOY_ENV", "dev")
 

poetry.lock

@@ -37,8 +37,10 @@ pynamodb = {version="*", optional=true}
 [tool.poetry.dev-dependencies]
 black = "*"
 boto3 = "*"
+boto3-stubs = "*"
 gitlint = "*"
 isort = "*"
+mypy = "*"
 pre-commit = "*"
 pylint = "*"
 pytest = "*"