Default gender counts to 0, removed unused imports, fixed linting errors

analytics_data_api/v0/serializers.py

@@ -47,6 +47,7 @@ class ModelSerializerWithCreatedField(serializers.ModelSerializer):
     created = serializers.DateTimeField(format=settings.DATETIME_FORMAT)
 
 
+# pylint: disable=abstract-method
 class ProblemSerializer(serializers.Serializer):
     """
     Serializer for problems.
@@ -59,6 +60,7 @@ class ProblemSerializer(serializers.Serializer):
     created = serializers.DateTimeField(format=settings.DATETIME_FORMAT)
 
 
+# pylint: disable=abstract-method
 class ProblemsAndTagsSerializer(serializers.Serializer):
     """
     Serializer for problems and tags.
@@ -231,6 +233,7 @@ class CourseEnrollmentModeDailySerializer(BaseCourseEnrollmentModelSerializer):
         fields = ['course_id', 'date', 'count', 'cumulative_count', 'created'] + ENROLLMENT_MODES
 
 
+# pylint: disable=abstract-method
 class CountrySerializer(serializers.Serializer):
     """
     Serialize country to an object with fields for the complete country name
@@ -329,10 +332,12 @@ class VideoTimelineSerializer(ModelSerializerWithCreatedField):
         )
 
 
+# pylint: disable=abstract-method
 class LastUpdatedSerializer(serializers.Serializer):
     last_updated = serializers.DateTimeField(source='date', format=settings.DATE_FORMAT)
 
 
+# pylint: disable=abstract-method
 class LearnerSerializer(serializers.Serializer):
     username = serializers.CharField()
     enrollment_mode = serializers.CharField()
@@ -407,6 +412,7 @@ class EdxPaginationSerializer(pagination.PageNumberPagination):
         ]))
 
 
+# pylint: disable=abstract-method
 class EngagementDaySerializer(serializers.Serializer):
     date = serializers.DateField(format=settings.DATE_FORMAT)
     problems_attempted = serializers.SerializerMethodField()
@@ -427,11 +433,13 @@ class EngagementDaySerializer(serializers.Serializer):
         return obj.get('videos_viewed', 0)
 
 
+# pylint: disable=abstract-method
 class DateRangeSerializer(serializers.Serializer):
     start = serializers.DateTimeField(source='start_date', format=settings.DATE_FORMAT)
     end = serializers.DateTimeField(source='end_date', format=settings.DATE_FORMAT)
 
 
+# pylint: disable=abstract-method
 class EnagementRangeMetricSerializer(serializers.Serializer):
     """
     Serializes ModuleEngagementMetricRanges ('bottom', 'average', and 'top') into
@@ -456,6 +464,7 @@ class EnagementRangeMetricSerializer(serializers.Serializer):
         return [metric_range.low_value, metric_range.high_value] if metric_range else None
 
 
+# pylint: disable=abstract-method
 class CourseLearnerMetadataSerializer(serializers.Serializer):
     enrollment_modes = serializers.ReadOnlyField(source='es_data.enrollment_modes')
     segments = serializers.ReadOnlyField(source='es_data.segments')

analytics_data_api/v0/views/courses.py

@@ -15,7 +15,7 @@ from analytics_data_api.constants import enrollment_modes
 from analytics_data_api.utils import dictfetchall
 from analytics_data_api.v0 import models, serializers
 
-from utils import raise_404_if_none
+from analytics_data_api.v0.views.utils import raise_404_if_none
 
 
 class BaseCourseView(generics.ListAPIView):
@@ -242,7 +242,7 @@ class CourseActivityMostRecentWeekView(generics.RetrieveAPIView):
 
         return activity_type
 
-    def get_object(self, queryset=None):
+    def get_object(self):
         """Select the activity report for the given course and activity type."""
 
         warnings.warn('CourseActivityMostRecentWeekView has been deprecated! Use CourseActivityWeeklyView instead.',
@@ -403,7 +403,11 @@ class CourseEnrollmentByGenderView(BaseCourseEnrollmentView):
             item = {
                 u'course_id': key[0],
                 u'date': key[1],
-                u'created': None
+                u'created': None,
+                u'male': 0,
+                u'female': 0,
+                u'other': 0,
+                u'unknown': 0
             }
 
             for enrollment in group:

analytics_data_api/v0/views/learners.py

@@ -103,7 +103,7 @@ class LearnerView(LastUpdateMixin, CourseViewMixin, generics.RetrieveAPIView):
     def get_queryset(self):
         return RosterEntry.get_course_user(self.course_id, self.username)
 
-    def get_object(self, queryset=None):
+    def get_object(self):
         queryset = self.get_queryset()
         if len(queryset) == 1:
             return queryset[0]
@@ -362,7 +362,7 @@ class CourseLearnerMetadata(CourseViewMixin, generics.RetrieveAPIView):
     """
     serializer_class = CourseLearnerMetadataSerializer
 
-    def get_object(self, queryset=None):
+    def get_object(self):
         # Because we're serializing data from both Elasticsearch and MySQL into
         # the same JSON object, we have to pass both sources of data in a dict
         # to our custom course metadata serializer.

analytics_data_api/v0/views/problems.py

@@ -22,7 +22,7 @@ from analytics_data_api.v0.serializers import (
 )
 from analytics_data_api.utils import matching_tuple
 
-from utils import raise_404_if_none
+from analytics_data_api.v0.views.utils import raise_404_if_none
 
 
 class ProblemResponseAnswerDistributionView(generics.ListAPIView):

analytics_data_api/v0/views/utils.py

@@ -12,6 +12,7 @@ def split_query_argument(argument):
     else:
         return None
 
+
 def raise_404_if_none(func):
     """
     Decorator for raiseing Http404 if function evaulation is falsey (e.g. empty queryset).

analytics_data_api/v0/views/videos.py

@@ -7,7 +7,8 @@ from rest_framework import generics
 from analytics_data_api.v0.models import VideoTimeline
 from analytics_data_api.v0.serializers import VideoTimelineSerializer
 
-from utils import raise_404_if_none
+from analytics_data_api.v0.views.utils import raise_404_if_none
+
 
 class VideoTimelineView(generics.ListAPIView):
     """