feat: [FC-0074] add static type checking for documentation purposes

Makefile

@@ -49,6 +49,7 @@ upgrade:  ## update the requirements/*.txt files with the latest packages satisf
 
 quality: ## check coding style with pycodestyle and pylint
 	pylint openedx_filters test_utils *.py
+	mypy
 	pycodestyle openedx_filters  *.py
 	pydocstyle openedx_filters *.py
 	isort --check-only --diff --recursive test_utils openedx_filters *.py test_settings.py

mypy.ini

@@ -0,0 +1,9 @@
+[mypy]
+allow_untyped_globals = False
+plugins =
+    mypy_django_plugin.main,
+files =
+    openedx_filters
+
+[mypy.plugins.django-stubs]
+django_settings_module = "test_utils.test_settings"

openedx_filters/course_authoring/filters.py

@@ -25,7 +25,7 @@ class LMSPageURLRequested(OpenEdxPublicFilter):
     filter_type = "org.openedx.course_authoring.lms.page.url.requested.v1"
 
     @classmethod
-    def run_filter(cls, url: str, org: str) -> tuple[str, str]:
+    def run_filter(cls, url: str, org: str) -> tuple[str | None, str | None]:
         """
         Process the inputs using the configured pipeline steps to modify the URL of the page requested by the user.
 

openedx_filters/exceptions.py

@@ -3,6 +3,9 @@
 """
 
 
+from typing import Optional
+
+
 class OpenEdxFilterException(Exception):
     """
     Base exception for filters.
@@ -18,7 +21,13 @@ class OpenEdxFilterException(Exception):
         exception.
     """
 
-    def __init__(self, message="", redirect_to=None, status_code=None, **kwargs):
+    def __init__(
+        self,
+        message: str = "",
+        redirect_to: str = "",
+        status_code: Optional[int] = None,
+        **kwargs
+    ) -> None:
         """
         Init method for OpenEdxFilterException.
 
@@ -31,7 +40,7 @@ def __init__(self, message="", redirect_to=None, status_code=None, **kwargs):
         for key, value in kwargs.items():
             setattr(self, key, value)
 
-    def __str__(self):
+    def __str__(self) -> str:
         """
         Show string representation of OpenEdxFilterException using its message.
         """

openedx_filters/learning/filters.py

@@ -94,7 +94,7 @@ def __init__(self, message: str, response: Optional[HttpResponse] = None) -> Non
             super().__init__(message, response=response)
 
     @classmethod
-    def run_filter(cls, context: dict, template_name: str) -> tuple[dict, str]:
+    def run_filter(cls, context: dict[str, Any], template_name: str) -> tuple[dict[str, Any] | None, str | None]:
         """
         Process the input context and template_name using the configured pipeline steps to modify the account settings.
 
@@ -159,7 +159,7 @@ def run_filter(cls, form_data: QueryDict) -> QueryDict:
         """
         sensitive_data = cls.extract_sensitive_data(form_data)
         data = super().run_pipeline(form_data=form_data)
-        form_data = data.get("form_data")
+        form_data = data.get("form_data", QueryDict())
         form_data.update(sensitive_data)
         return form_data
 
@@ -249,7 +249,7 @@ class PreventEnrollment(OpenEdxFilterException):
         """
 
     @classmethod
-    def run_filter(cls, user: Any, course_key: CourseKey, mode: str) -> tuple[Any, CourseKey, str]:
+    def run_filter(cls, user: Any, course_key: CourseKey, mode: str) -> tuple[Any, CourseKey | None, str | None]:
         """
         Process the user, course_key, and mode using the configured pipeline steps to modify the enrollment process.
 
@@ -345,14 +345,14 @@ class PreventCertificateCreation(OpenEdxFilterException):
 
     @classmethod
     def run_filter(  # pylint: disable=too-many-positional-arguments
-        cls: type,
+        cls,
         user: Any,
         course_key: CourseKey,
         mode: str,
         status: str,
         grade: float,
         generation_mode: str,
-    ) -> tuple[Any, CourseKey, str, str, float, str]:
+    ) -> tuple[Any, CourseKey | None, str | None, str | None, float | None, str | None]:
         """
         Process the inputs using the configured pipeline steps to modify the certificate creation process.
 
@@ -460,7 +460,7 @@ def __init__(self, message: str, response: HttpResponse) -> None:
             )
 
     @classmethod
-    def run_filter(cls, context: dict, custom_template: Any) -> tuple[dict, Any]:
+    def run_filter(cls, context: dict, custom_template: Any) -> tuple[dict[str, Any] | None, Any]:
         """
         Process the context and custom_template using the configured pipeline steps to modify the certificate rendering.
 
@@ -646,7 +646,7 @@ def __init__(self, message: str, response: HttpResponse) -> None:
             )
 
     @classmethod
-    def run_filter(cls, context: dict, template_name: str) -> tuple[dict, str]:
+    def run_filter(cls, context: dict[str, Any], template_name: str) -> tuple[dict[str, Any] | None, str | None]:
         """
         Process the context and template_name using the configured pipeline steps to modify the course about rendering.
 
@@ -745,7 +745,7 @@ def __init__(self, message: str, response: Optional[HttpResponse] = None) -> Non
             )
 
     @classmethod
-    def run_filter(cls, context: dict, template_name: str) -> tuple[dict, str]:
+    def run_filter(cls, context: dict[str, Any], template_name: str) -> tuple[dict[str, Any] | None, str | None]:
         """
         Process the context and template_name using the configured pipeline steps to modify the dashboard rendering.
 
@@ -790,7 +790,7 @@ class PreventChildBlockRender(OpenEdxFilterException):
         """
 
     @classmethod
-    def run_filter(cls, block: Any, context: dict) -> tuple[Any, dict]:
+    def run_filter(cls, block: Any, context: dict[str, Any]) -> tuple[Any, dict[str, Any] | None]:
         """
         Process the block and context using the configured pipeline steps to modify the rendering of a child block.
 
@@ -833,7 +833,7 @@ class PreventEnrollmentQuerysetRequest(OpenEdxFilterException):
         """
 
     @classmethod
-    def run_filter(cls, enrollments: QuerySet) -> QuerySet:
+    def run_filter(cls, enrollments: QuerySet) -> QuerySet | None:
         """
         Process the enrollments QuerySet using the configured pipeline steps to modify the course enrollment data.
 
@@ -891,7 +891,11 @@ def __init__(self, message: str, response: Optional[HttpResponse] = None):
             super().__init__(message, response=response)
 
     @classmethod
-    def run_filter(cls, context: dict, student_view_context: dict):
+    def run_filter(
+        cls,
+        context: dict[str, Any],
+        student_view_context: dict
+    ) -> tuple[dict[str, Any] | None, dict[str, Any] | None]:
         """
         Process the inputs using the configured pipeline steps to modify the rendering of an XBlock.
 
@@ -936,7 +940,13 @@ class PreventVerticalBlockRender(OpenEdxFilterException):
         """
 
     @classmethod
-    def run_filter(cls, block: Any, fragment: Any, context: dict, view: str) -> tuple[Any, Any, dict, str]:
+    def run_filter(
+        cls,
+        block: Any,
+        fragment: Any,
+        context: dict[str, Any],
+        view: str
+    ) -> tuple[Any, Any, dict[str, Any] | None, str | None]:
         """
         Process the inputs using the configured pipeline steps to modify the rendering of a vertical block.
 
@@ -976,7 +986,7 @@ class CourseHomeUrlCreationStarted(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.course.homepage.url.creation.started.v1"
 
     @classmethod
-    def run_filter(cls, course_key: CourseKey, course_home_url: str) -> tuple[CourseKey, str]:
+    def run_filter(cls, course_key: CourseKey, course_home_url: str) -> tuple[CourseKey | None, str | None]:
         """
         Process the course_key and course_home_url using the configured pipeline steps to modify the course home url.
 
@@ -1013,7 +1023,11 @@ class CourseEnrollmentAPIRenderStarted(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.home.enrollment.api.rendered.v1"
 
     @classmethod
-    def run_filter(cls, course_key: CourseKey, serialized_enrollment: dict) -> tuple[CourseKey, dict]:
+    def run_filter(
+        cls,
+        course_key: CourseKey,
+        serialized_enrollment: dict[str, Any]
+    ) -> tuple[CourseKey | None, dict[str, Any] | None]:
         """
         Process the inputs using the configured pipeline steps to modify the course enrollment data.
 
@@ -1050,7 +1064,7 @@ class CourseRunAPIRenderStarted(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.home.courserun.api.rendered.started.v1"
 
     @classmethod
-    def run_filter(cls, serialized_courserun: dict) -> dict:
+    def run_filter(cls, serialized_courserun: dict[str, Any]) -> dict[str, Any] | None:
         """
         Process the serialized_courserun using the configured pipeline steps to modify the course run data.
 
@@ -1145,7 +1159,7 @@ def __init__(self, message: str, response: Optional[HttpResponse] = None):
             )
 
     @classmethod
-    def run_filter(cls, context: dict, template_name: str) -> tuple[dict, str]:
+    def run_filter(cls, context: dict[str, Any], template_name: str) -> tuple[dict[str, Any] | None, str | None]:
         """
         Process the context and template_name using the configured pipeline steps to modify the instructor dashboard.
 
@@ -1203,7 +1217,7 @@ def __init__(
             super().__init__(message, context=context, template_name=template_name)
 
     @classmethod
-    def run_filter(cls, context: dict, template_name: str) -> tuple[dict, str]:
+    def run_filter(cls, context: dict[str, Any], template_name: str) -> tuple[dict[str, Any] | None, str | None]:
         """
         Process the context and template_name using the configured pipeline steps to modify the submission view.
 
@@ -1240,7 +1254,7 @@ class IDVPageURLRequested(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.idv.page.url.requested.v1"
 
     @classmethod
-    def run_filter(cls, url: str) -> str:
+    def run_filter(cls, url: str) -> str | None:
         """
         Process the URL using the configured pipeline steps to modify the ID verification page URL.
 
@@ -1274,7 +1288,7 @@ class CourseAboutPageURLRequested(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.course_about.page.url.requested.v1"
 
     @classmethod
-    def run_filter(cls, url: str, org: str) -> tuple[str, str]:
+    def run_filter(cls, url: str, org: str) -> tuple[str | None, str | None]:
         """
         Process the URL and org using the configured pipeline steps to modify the course about page URL.
 
@@ -1312,7 +1326,7 @@ class ScheduleQuerySetRequested(OpenEdxPublicFilter):
     filter_type = "org.openedx.learning.schedule.queryset.requested.v1"
 
     @classmethod
-    def run_filter(cls, schedules: QuerySet) -> QuerySet:
+    def run_filter(cls, schedules: QuerySet) -> QuerySet | None:
         """
         Process the schedules QuerySet using the configured pipeline steps to modify the schedules data.
 

openedx_filters/learning/tests/test_filters.py

@@ -3,7 +3,8 @@
 """
 from unittest.mock import Mock, patch
 
-from ddt import data, ddt, unpack
+# Ignore the type error for ddt import since it is not recognized by mypy.
+from ddt import data, ddt, unpack  # type: ignore
 from django.test import TestCase
 
 from openedx_filters.learning.filters import (

openedx_filters/tests/test_tooling.py

@@ -3,7 +3,8 @@
 """
 from unittest.mock import Mock, patch
 
-import ddt
+# Ignore the type error for ddt import since it is not recognized by mypy.
+import ddt  # type: ignore
 from django.test import TestCase, override_settings
 
 from openedx_filters import PipelineStep

openedx_filters/tooling.py

@@ -2,6 +2,7 @@
 Tooling necessary to use Open edX Filters.
 """
 from logging import getLogger
+from typing import Any
 
 from django.conf import settings
 from django.utils.module_loading import import_string
@@ -18,14 +19,14 @@ class OpenEdxPublicFilter:
 
     filter_type = ""
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         """
         Represent OpenEdxPublicFilter as a string.
         """
         return "<OpenEdxPublicFilter: {filter_type}>".format(filter_type=self.filter_type)
 
     @classmethod
-    def get_steps_for_pipeline(cls, pipeline, fail_silently):
+    def get_steps_for_pipeline(cls, pipeline: list, fail_silently: bool = True) -> list[type]:
         """
         Get pipeline objects from paths.
 
@@ -68,7 +69,7 @@ def get_steps_for_pipeline(cls, pipeline, fail_silently):
         return step_list
 
     @classmethod
-    def get_pipeline_configuration(cls):
+    def get_pipeline_configuration(cls) -> tuple[list[str], bool, dict[str, Any]]:
         """
         Get pipeline configuration from filter settings.
 
@@ -97,7 +98,9 @@ def get_pipeline_configuration(cls):
         """
         filter_config = cls.get_filter_config()
 
-        pipeline, fail_silently, extra_config = [], True, {}
+        pipeline: list = []
+        fail_silently: bool = True
+        extra_config: dict = {}
 
         if not filter_config:
             return pipeline, fail_silently, extra_config
@@ -119,7 +122,7 @@ def get_pipeline_configuration(cls):
         return pipeline, fail_silently, extra_config
 
     @classmethod
-    def get_filter_config(cls):
+    def get_filter_config(cls) -> dict[str, Any]:
         """
         Get filters configuration from settings.
 
@@ -161,7 +164,7 @@ def get_filter_config(cls):
         return filters_config.get(cls.filter_type, {})
 
     @classmethod
-    def run_pipeline(cls, **kwargs):
+    def run_pipeline(cls, **kwargs: Any) -> dict[str, Any] | Any:
         """
         Execute filters in order.
 

openedx_filters/utils.py

@@ -3,15 +3,18 @@
 """
 
 
+from django.http import QueryDict
+
+
 class SensitiveDataManagementMixin:
     """
     Custom class used manage sensitive data within filter arguments.
     """
 
-    sensitive_form_data = []
+    sensitive_form_data: list[str] = []
 
     @classmethod
-    def extract_sensitive_data(cls, form_data):
+    def extract_sensitive_data(cls, form_data: QueryDict) -> dict[str, str]:
         """
         Extract sensitive data from its child class input arguments.
 
@@ -30,6 +33,6 @@ def extract_sensitive_data(cls, form_data):
         for key, value in base_form_data.items():
             if key in cls.sensitive_form_data:
                 form_data.pop(key)
-                sensitive_data[key] = value
+                sensitive_data[key] = str(value)
 
         return sensitive_data