From e9b3d8e8ec04dfda30ac5b81decf4532c2ce9674 Mon Sep 17 00:00:00 2001
From: Ayub khan <muhammadayubkhan6@gmail.com>
Date: Tue, 9 Jul 2019 14:19:16 +0500
Subject: [PATCH] INCR-333 python3 compatibility

---
 cms/djangoapps/contentstore/views/__init__.py | 13 +++--
 cms/djangoapps/contentstore/views/access.py   |  2 +
 .../contentstore/views/certificates.py        | 13 +++--
 .../contentstore/views/checklists.py          |  4 +-
 cms/djangoapps/contentstore/views/course.py   | 49 ++++++++++---------
 .../contentstore/views/entrance_exam.py       | 21 ++++----
 cms/djangoapps/contentstore/views/error.py    |  2 +
 .../contentstore/views/organization.py        |  2 +
 cms/djangoapps/contentstore/views/tabs.py     |  5 +-
 .../contentstore/views/transcripts_ajax.py    | 22 +++++----
 10 files changed, 77 insertions(+), 56 deletions(-)

diff --git a/cms/djangoapps/contentstore/views/__init__.py b/cms/djangoapps/contentstore/views/__init__.py
index e90628aef4..3f81e7f8f9 100644
--- a/cms/djangoapps/contentstore/views/__init__.py
+++ b/cms/djangoapps/contentstore/views/__init__.py
@@ -2,26 +2,25 @@
 
 "All view functions for contentstore, broken out into submodules"
 
-# Disable warnings about import from wildcard
-# All files below declare exports with __all__
 from .assets import *
+from .checklists import *
 from .component import *
 from .course import *
-from .checklists import *
 from .entrance_exam import *
 from .error import *
+from .export_git import *
 from .helpers import *
-from .item import *
 from .import_export import *
+from .item import *
 from .library import *
 from .preview import *
 from .public import *
-from .export_git import *
-from .user import *
 from .tabs import *
-from .videos import *
 from .transcript_settings import *
 from .transcripts_ajax import *
+from .user import *
+from .videos import *
+
 try:
     from .dev import *
 except ImportError:
diff --git a/cms/djangoapps/contentstore/views/access.py b/cms/djangoapps/contentstore/views/access.py
index 50fb74e55c..2ed9de9453 100644
--- a/cms/djangoapps/contentstore/views/access.py
+++ b/cms/djangoapps/contentstore/views/access.py
@@ -1,5 +1,7 @@
 """ Helper methods for determining user access permissions in Studio """
 
+from __future__ import absolute_import
+
 from student import auth
 from student.roles import CourseInstructorRole
 
diff --git a/cms/djangoapps/contentstore/views/certificates.py b/cms/djangoapps/contentstore/views/certificates.py
index acef5a41d1..a47af6ec8f 100644
--- a/cms/djangoapps/contentstore/views/certificates.py
+++ b/cms/djangoapps/contentstore/views/certificates.py
@@ -21,9 +21,12 @@ course.certificates: {
     ]
 }
 """
+from __future__ import absolute_import
+
 import json
 import logging
 
+import six
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
@@ -31,6 +34,7 @@ from django.http import HttpResponse
 from django.utils.translation import ugettext as _
 from django.views.decorators.csrf import ensure_csrf_cookie
 from django.views.decorators.http import require_http_methods
+from eventtracking import tracker
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import AssetKey, CourseKey
 from six import text_type
@@ -40,7 +44,6 @@ from contentstore.views.assets import delete_asset
 from contentstore.views.exception import AssetNotFoundException
 from course_modes.models import CourseMode
 from edxmako.shortcuts import render_to_response
-from eventtracking import tracker
 from student.auth import has_studio_write_access
 from student.roles import GlobalStaff
 from util.db import MYSQL_MAX_INT, generate_int_id
@@ -358,7 +361,7 @@ def certificate_activation_handler(request, course_key_string):
     store.update_item(course, request.user.id)
     cert_event_type = 'activated' if is_active else 'deactivated'
     CertificateManager.track_event(cert_event_type, {
-        'course_id': unicode(course.id),
+        'course_id': six.text_type(course.id),
     })
     return HttpResponse(status=200)
 
@@ -446,7 +449,7 @@ def certificates_list_handler(request, course_key_string):
                 )
                 store.update_item(course, request.user.id)
                 CertificateManager.track_event('created', {
-                    'course_id': unicode(course.id),
+                    'course_id': six.text_type(course.id),
                     'configuration_id': new_certificate.id
                 })
                 course = _get_course_and_check_access(course_key, request.user)
@@ -503,7 +506,7 @@ def certificates_detail_handler(request, course_key_string, certificate_id):
 
         store.update_item(course, request.user.id)
         CertificateManager.track_event(cert_event_type, {
-            'course_id': unicode(course.id),
+            'course_id': six.text_type(course.id),
             'configuration_id': serialized_certificate["id"]
         })
         return JsonResponse(serialized_certificate, status=201)
@@ -525,7 +528,7 @@ def certificates_detail_handler(request, course_key_string, certificate_id):
             certificate_id=certificate_id
         )
         CertificateManager.track_event('deleted', {
-            'course_id': unicode(course.id),
+            'course_id': six.text_type(course.id),
             'configuration_id': certificate_id
         })
         return JsonResponse(status=204)
diff --git a/cms/djangoapps/contentstore/views/checklists.py b/cms/djangoapps/contentstore/views/checklists.py
index f3fb7cffba..ebea256a50 100644
--- a/cms/djangoapps/contentstore/views/checklists.py
+++ b/cms/djangoapps/contentstore/views/checklists.py
@@ -1,12 +1,14 @@
 # pylint: disable=missing-docstring
+from __future__ import absolute_import
+
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
 from django.views.decorators.csrf import ensure_csrf_cookie
 from opaque_keys.edx.keys import CourseKey
-from xmodule.modulestore.django import modulestore
 
 from edxmako.shortcuts import render_to_response
 from student.auth import has_course_author_access
+from xmodule.modulestore.django import modulestore
 
 __all__ = ['checklists_handler']
 
diff --git a/cms/djangoapps/contentstore/views/course.py b/cms/djangoapps/contentstore/views/course.py
index 0aa32a6647..f4ef8c320f 100644
--- a/cms/djangoapps/contentstore/views/course.py
+++ b/cms/djangoapps/contentstore/views/course.py
@@ -1,13 +1,15 @@
 """
 Views related to operations on course objects
 """
-from collections import defaultdict
+from __future__ import absolute_import
+
 import copy
 import json
 import logging
 import random
 import re
 import string
+from collections import defaultdict
 
 import django.utils
 import six
@@ -15,20 +17,18 @@ from ccx_keys.locator import CCXLocator
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied, ValidationError
-from django.urls import reverse
 from django.http import Http404, HttpResponse, HttpResponseBadRequest, HttpResponseNotFound
 from django.shortcuts import redirect
+from django.urls import reverse
 from django.utils.translation import ugettext as _
 from django.views.decorators.csrf import ensure_csrf_cookie
 from django.views.decorators.http import require_GET, require_http_methods
+from milestones import api as milestones_api
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
 from opaque_keys.edx.locator import BlockUsageLocator
-from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
-from openedx.core.djangoapps.waffle_utils import WaffleSwitchNamespace
-from openedx.features.course_experience.waffle import waffle as course_experience_waffle
-from openedx.features.course_experience.waffle import ENABLE_COURSE_ABOUT_SIDEBAR_HTML
 from six import text_type
+from six.moves import filter
 
 from contentstore.course_group_config import (
     COHORT_SCHEME,
@@ -56,19 +56,22 @@ from course_action_state.managers import CourseActionStateItemNotFoundError
 from course_action_state.models import CourseRerunState, CourseRerunUIStateManager
 from course_creators.views import add_user_with_status_unrequested, get_course_creator_status
 from edxmako.shortcuts import render_to_response
-from milestones import api as milestones_api
 from models.settings.course_grading import CourseGradingModel
 from models.settings.course_metadata import CourseMetadata
 from models.settings.encoder import CourseSettingsEncoder
+from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.djangoapps.credit.api import get_credit_requirements, is_credit_course
 from openedx.core.djangoapps.credit.tasks import update_credit_course_requirements
 from openedx.core.djangoapps.models.course_details import CourseDetails
 from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
+from openedx.core.djangoapps.waffle_utils import WaffleSwitchNamespace
 from openedx.core.djangolib.js_utils import dump_js_escaped_json
 from openedx.core.lib.course_tabs import CourseTabPluginManager
 from openedx.core.lib.courses import course_image_url
-from openedx.features.content_type_gating.partitions import CONTENT_TYPE_GATING_SCHEME
 from openedx.features.content_type_gating.models import ContentTypeGatingConfig
+from openedx.features.content_type_gating.partitions import CONTENT_TYPE_GATING_SCHEME
+from openedx.features.course_experience.waffle import ENABLE_COURSE_ABOUT_SIDEBAR_HTML
+from openedx.features.course_experience.waffle import waffle as course_experience_waffle
 from student import auth
 from student.auth import has_course_author_access, has_studio_read_access, has_studio_write_access
 from student.roles import CourseCreatorRole, CourseInstructorRole, CourseStaffRole, GlobalStaff, UserBasedRole
@@ -460,7 +463,7 @@ def _accessible_courses_list_from_groups(request):
 
     instructor_courses = UserBasedRole(request.user, CourseInstructorRole.ROLE).courses_with_role()
     staff_courses = UserBasedRole(request.user, CourseStaffRole.ROLE).courses_with_role()
-    all_courses = filter(filter_ccx, instructor_courses | staff_courses)
+    all_courses = list(filter(filter_ccx, instructor_courses | staff_courses))
     courses_list = []
     course_keys = {}
 
@@ -469,7 +472,7 @@ def _accessible_courses_list_from_groups(request):
             raise AccessListFallback
         course_keys[course_access.course_id] = course_access.course_id
 
-    course_keys = course_keys.values()
+    course_keys = list(course_keys.values())
 
     if course_keys:
         courses_list = modulestore().get_course_summaries(course_keys=course_keys)
@@ -514,7 +517,7 @@ def course_listing(request):
         """
         return {
             u'display_name': uca.display_name,
-            u'course_key': unicode(uca.course_key),
+            u'course_key': six.text_type(uca.course_key),
             u'org': uca.course_key.org,
             u'number': uca.course_key.course,
             u'run': uca.course_key.run,
@@ -536,8 +539,8 @@ def course_listing(request):
 
         return {
             u'display_name': library.display_name,
-            u'library_key': unicode(library.location.library_key),
-            u'url': reverse_library_url(u'library_handler', unicode(library.location.library_key)),
+            u'library_key': six.text_type(library.location.library_key),
+            u'url': reverse_library_url(u'library_handler', six.text_type(library.location.library_key)),
             u'org': library.display_org_with_default,
             u'number': library.display_number_with_default,
             u'can_edit': has_studio_write_access(request.user, library.location.library_key),
@@ -624,7 +627,7 @@ def course_index(request, course_key):
         lms_link = get_lms_link_for_item(course_module.location)
         reindex_link = None
         if settings.FEATURES.get('ENABLE_COURSEWARE_INDEX', False):
-            reindex_link = "/course/{course_id}/search_reindex".format(course_id=unicode(course_key))
+            reindex_link = "/course/{course_id}/search_reindex".format(course_id=six.text_type(course_key))
         sections = course_module.get_children()
         course_structure = _course_outline_json(request, course_module)
         locator_to_show = request.GET.get('show', None)
@@ -708,7 +711,7 @@ def _process_courses_list(courses_iter, in_process_course_actions, split_archive
         """
         return {
             'display_name': course.display_name,
-            'course_key': unicode(course.location.course_key),
+            'course_key': six.text_type(course.location.course_key),
             'url': reverse_course_url('course_handler', course.id),
             'lms_link': get_lms_link_for_item(course.location),
             'rerun_link': _get_rerun_link_for_item(course.id),
@@ -819,14 +822,14 @@ def _create_or_rerun_course(request):
             destination_course_key = rerun_course(request.user, source_course_key, org, course, run, fields)
             return JsonResponse({
                 'url': reverse_url('course_handler'),
-                'destination_course_key': unicode(destination_course_key)
+                'destination_course_key': six.text_type(destination_course_key)
             })
         else:
             try:
                 new_course = create_new_course(request.user, org, course, run, fields)
                 return JsonResponse({
                     'url': reverse_course_url('course_handler', new_course.id),
-                    'course_key': unicode(new_course.id),
+                    'course_key': six.text_type(new_course.id),
                 })
             except ValidationError as ex:
                 return JsonResponse({'error': text_type(ex)}, status=400)
@@ -928,7 +931,7 @@ def rerun_course(user, source_course_key, org, number, run, fields, background=T
     fields['video_upload_pipeline'] = {}
 
     json_fields = json.dumps(fields, cls=EdxJSONEncoder)
-    args = [unicode(source_course_key), unicode(destination_course_key), user.id, json_fields]
+    args = [six.text_type(source_course_key), six.text_type(destination_course_key), user.id, json_fields]
 
     if background:
         rerun_course_task.delay(*args)
@@ -1221,7 +1224,7 @@ def grading_handler(request, course_key_string, grader_index=None):
                 # update credit course requirements if 'minimum_grade_credit'
                 # field value is changed
                 if 'minimum_grade_credit' in request.json:
-                    update_credit_course_requirements.delay(unicode(course_key))
+                    update_credit_course_requirements.delay(six.text_type(course_key))
 
                 # None implies update the whole model (cutoffs, graceperiod, and graders) not a specific grader
                 if grader_index is None:
@@ -1369,7 +1372,7 @@ def validate_textbook_json(textbook):
     """
     Validate the given text as representing a list of PDF textbooks
     """
-    if isinstance(textbook, basestring):
+    if isinstance(textbook, six.string_types):
         try:
             textbook = json.loads(textbook)
         except ValueError:
@@ -1378,7 +1381,7 @@ def validate_textbook_json(textbook):
         raise TextbookValidationError("must be JSON object")
     if not textbook.get("tab_title"):
         raise TextbookValidationError("must have tab_title")
-    tid = unicode(textbook.get("id", ""))
+    tid = six.text_type(textbook.get("id", ""))
     if tid and not tid[0].isdigit():
         raise TextbookValidationError("textbook ID must start with a digit")
     return textbook
@@ -1495,7 +1498,7 @@ def textbooks_detail_handler(request, course_key_string, textbook_id):
     with store.bulk_operations(course_key):
         course_module = get_course_and_check_access(course_key, request.user)
         matching_id = [tb for tb in course_module.pdf_textbooks
-                       if unicode(tb.get("id")) == unicode(textbook_id)]
+                       if six.text_type(tb.get("id")) == six.text_type(textbook_id)]
         if matching_id:
             textbook = matching_id[0]
         else:
@@ -1683,7 +1686,7 @@ def group_configurations_detail_handler(request, course_key_string, group_config
     with store.bulk_operations(course_key):
         course = get_course_and_check_access(course_key, request.user)
         matching_id = [p for p in course.user_partitions
-                       if unicode(p.id) == unicode(group_configuration_id)]
+                       if six.text_type(p.id) == six.text_type(group_configuration_id)]
         if matching_id:
             configuration = matching_id[0]
         else:
diff --git a/cms/djangoapps/contentstore/views/entrance_exam.py b/cms/djangoapps/contentstore/views/entrance_exam.py
index c6944a5673..b1d9d0d5db 100644
--- a/cms/djangoapps/contentstore/views/entrance_exam.py
+++ b/cms/djangoapps/contentstore/views/entrance_exam.py
@@ -2,9 +2,12 @@
 Entrance Exams view module -- handles all requests related to entrance exam management via Studio
 Intended to be utilized as an AJAX callback handler, versus a proper view/screen
 """
+from __future__ import absolute_import
+
 import logging
 from functools import wraps
 
+import six
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.http import HttpResponse, HttpResponseBadRequest
@@ -130,7 +133,7 @@ def _create_entrance_exam(request, course_key, entrance_exam_minimum_score_pct=N
         return HttpResponse(status=400)
 
     # Create the entrance exam item (currently it's just a chapter)
-    parent_locator = unicode(course.location)
+    parent_locator = six.text_type(course.location)
     created_block = create_xblock(
         parent_locator=parent_locator,
         user=request.user,
@@ -145,13 +148,13 @@ def _create_entrance_exam(request, course_key, entrance_exam_minimum_score_pct=N
     metadata = {
         'entrance_exam_enabled': True,
         'entrance_exam_minimum_score_pct': entrance_exam_minimum_score_pct,
-        'entrance_exam_id': unicode(created_block.location),
+        'entrance_exam_id': six.text_type(created_block.location),
     }
     CourseMetadata.update_from_dict(metadata, course, request.user)
 
     # Create the entrance exam section item.
     create_xblock(
-        parent_locator=unicode(created_block.location),
+        parent_locator=six.text_type(created_block.location),
         user=request.user,
         category='sequential',
         display_name=_('Entrance Exam - Subsection')
@@ -177,7 +180,7 @@ def _get_entrance_exam(request, course_key):  # pylint: disable=W0613
     try:
         exam_descriptor = modulestore().get_item(exam_key)
         return HttpResponse(
-            dump_js_escaped_json({'locator': unicode(exam_descriptor.location)}),
+            dump_js_escaped_json({'locator': six.text_type(exam_descriptor.location)}),
             status=200, content_type='application/json')
     except ItemNotFoundError:
         return HttpResponse(status=404)
@@ -246,7 +249,7 @@ def add_entrance_exam_milestone(course_id, x_block):
         if len(milestones):
             milestone = milestones[0]
         else:
-            description = u'Autogenerated during {} entrance exam creation.'.format(unicode(course_id))
+            description = u'Autogenerated during {} entrance exam creation.'.format(six.text_type(course_id))
             milestone = milestones_helpers.add_milestone({
                 'name': _('Completed Course Entrance Exam'),
                 'namespace': milestone_namespace,
@@ -254,13 +257,13 @@ def add_entrance_exam_milestone(course_id, x_block):
             })
         relationship_types = milestones_helpers.get_milestone_relationship_types()
         milestones_helpers.add_course_milestone(
-            unicode(course_id),
+            six.text_type(course_id),
             relationship_types['REQUIRES'],
             milestone
         )
         milestones_helpers.add_course_content_milestone(
-            unicode(course_id),
-            unicode(x_block.location),
+            six.text_type(course_id),
+            six.text_type(x_block.location),
             relationship_types['FULFILLS'],
             milestone
         )
@@ -277,4 +280,4 @@ def remove_entrance_exam_milestone_reference(request, course_key):
     for course_child in course_children:
         if course_child.is_entrance_exam:
             delete_item(request, course_child.scope_ids.usage_id)
-            milestones_helpers.remove_content_references(unicode(course_child.scope_ids.usage_id))
+            milestones_helpers.remove_content_references(six.text_type(course_child.scope_ids.usage_id))
diff --git a/cms/djangoapps/contentstore/views/error.py b/cms/djangoapps/contentstore/views/error.py
index 755417bda4..8045b0fd4a 100644
--- a/cms/djangoapps/contentstore/views/error.py
+++ b/cms/djangoapps/contentstore/views/error.py
@@ -1,5 +1,7 @@
 # pylint: disable=missing-docstring,unused-argument
 
+from __future__ import absolute_import
+
 import functools
 
 from django.http import HttpResponse, HttpResponseNotFound, HttpResponseServerError
diff --git a/cms/djangoapps/contentstore/views/organization.py b/cms/djangoapps/contentstore/views/organization.py
index 253229963a..7fa03d51ce 100644
--- a/cms/djangoapps/contentstore/views/organization.py
+++ b/cms/djangoapps/contentstore/views/organization.py
@@ -1,4 +1,6 @@
 """Organizations views for use with Studio."""
+from __future__ import absolute_import
+
 from django.contrib.auth.decorators import login_required
 from django.http import HttpResponse
 from django.utils.decorators import method_decorator
diff --git a/cms/djangoapps/contentstore/views/tabs.py b/cms/djangoapps/contentstore/views/tabs.py
index edfb438165..f5438f1ab5 100644
--- a/cms/djangoapps/contentstore/views/tabs.py
+++ b/cms/djangoapps/contentstore/views/tabs.py
@@ -1,6 +1,9 @@
 """
 Views related to course tabs
 """
+from __future__ import absolute_import
+
+import six
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
 from django.http import HttpResponseNotFound
@@ -197,7 +200,7 @@ def primitive_delete(course, num):
 def primitive_insert(course, num, tab_type, name):
     "Inserts a new tab at the given number (0 based)."
     validate_args(num, tab_type)
-    new_tab = CourseTab.from_json({u'type': unicode(tab_type), u'name': unicode(name)})
+    new_tab = CourseTab.from_json({u'type': six.text_type(tab_type), u'name': six.text_type(name)})
     tabs = course.tabs
     tabs.insert(num, new_tab)
     modulestore().update_item(course, ModuleStoreEnum.UserID.primitive_command)
diff --git a/cms/djangoapps/contentstore/views/transcripts_ajax.py b/cms/djangoapps/contentstore/views/transcripts_ajax.py
index 9f4de090a3..8c1a76b722 100644
--- a/cms/djangoapps/contentstore/views/transcripts_ajax.py
+++ b/cms/djangoapps/contentstore/views/transcripts_ajax.py
@@ -5,6 +5,8 @@ Actions manager for transcripts ajax calls.
 Module do not support rollback (pressing "Cancel" button in Studio)
 All user changes are saved immediately.
 """
+from __future__ import absolute_import
+
 import copy
 import json
 import logging
@@ -17,10 +19,12 @@ from django.core.exceptions import PermissionDenied
 from django.core.files.base import ContentFile
 from django.http import Http404, HttpResponse
 from django.utils.translation import ugettext as _
+from edxval.api import create_external_video, create_or_update_video_transcript
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import UsageKey
 from six import text_type
-from edxval.api import create_or_update_video_transcript, create_external_video
+
+from cms.djangoapps.contentstore.views.videos import TranscriptProvider
 from student.auth import has_course_author_access
 from util.json_request import JsonResponse
 from xmodule.contentstore.content import StaticContent
@@ -29,21 +33,19 @@ from xmodule.exceptions import NotFoundError
 from xmodule.modulestore.django import modulestore
 from xmodule.modulestore.exceptions import ItemNotFoundError
 from xmodule.video_module.transcripts_utils import (
+    GetTranscriptsFromYouTubeException,
+    Transcript,
+    TranscriptsGenerationException,
+    TranscriptsRequestValidationException,
     clean_video_id,
     download_youtube_subs,
-    GetTranscriptsFromYouTubeException,
-    get_transcript_for_video,
-    get_transcripts_from_youtube,
-    Transcript,
-    TranscriptsRequestValidationException,
-    TranscriptsGenerationException,
-    youtube_video_transcript_name,
     get_transcript,
+    get_transcript_for_video,
     get_transcript_from_val,
+    get_transcripts_from_youtube,
+    youtube_video_transcript_name
 )
 
-from cms.djangoapps.contentstore.views.videos import TranscriptProvider
-
 __all__ = [
     'upload_transcripts',
     'download_transcripts',