Fixed pylint violation for files in lms/djangoapps/ccx

lms/djangoapps/ccx/tests/test_views.py

@@ -10,23 +10,22 @@ from mock import patch, MagicMock
 from nose.plugins.attrib import attr
 
 from capa.tests.response_xml_factory import StringResponseXMLFactory
-from courseware.courses import get_course_by_id  # pyline: disable=import-error
-from courseware.field_overrides import OverrideFieldData  # pylint: disable=import-error
-from courseware.tests.factories import StudentModuleFactory  # pylint: disable=import-error
-from courseware.tests.helpers import LoginEnrollmentTestCase  # pylint: disable=import-error
+from courseware.courses import get_course_by_id
+from courseware.tests.factories import StudentModuleFactory
+from courseware.tests.helpers import LoginEnrollmentTestCase
 from courseware.tabs import get_course_tab_list
 from django.core.urlresolvers import reverse
 from django.utils.timezone import UTC
 from django.test.utils import override_settings
 from django.test import RequestFactory
-from edxmako.shortcuts import render_to_response  # pylint: disable=import-error
+from edxmako.shortcuts import render_to_response
 from request_cache.middleware import RequestCache
-from student.roles import CourseCcxCoachRole  # pylint: disable=import-error
+from student.roles import CourseCcxCoachRole
 from student.models import (
     CourseEnrollment,
     CourseEnrollmentAllowed,
 )
-from student.tests.factories import (  # pylint: disable=import-error
+from student.tests.factories import (
     AdminFactory,
     CourseEnrollmentFactory,
     UserFactory,
@@ -638,7 +637,8 @@ class TestCCXGrades(SharedModuleStoreTestCase, LoginEnrollmentTestCase):
                 metadata={'graded': True, 'format': 'Homework'})
             for _ in xrange(4)
         ]
-        problems = [
+        # making problems available at class level for possible future use in tests
+        cls.problems = [
             [
                 ItemFactory.create(
                     parent=section,

lms/djangoapps/ccx/views.py

@@ -36,12 +36,12 @@ from courseware.module_render import get_module_for_descriptor
 from edxmako.shortcuts import render_to_response
 from opaque_keys.edx.keys import CourseKey
 from ccx_keys.locator import CCXLocator
-from student.roles import CourseCcxCoachRole  # pylint: disable=import-error
+from student.roles import CourseCcxCoachRole
 from student.models import CourseEnrollment
 
-from instructor.offline_gradecalc import student_grades  # pylint: disable=import-error
-from instructor.views.api import _split_input_list  # pylint: disable=import-error
-from instructor.views.tools import get_student_from_identifier  # pylint: disable=import-error
+from instructor.offline_gradecalc import student_grades
+from instructor.views.api import _split_input_list
+from instructor.views.tools import get_student_from_identifier
 from instructor.enrollment import (
     enroll_email,
     unenroll_email,
@@ -50,7 +50,6 @@ from instructor.enrollment import (
 
 from .models import CustomCourseForEdX
 from .overrides import (
-    clear_override_for_ccx,
     get_override_for_ccx,
     override_field_for_ccx,
     clear_ccx_field_info_from_ccx_map,