Python-modernize on edx-platform (338 of 380)

After executing python-modernize and isort, few changes
occurred in import sequence as well as unicode func is
replaced by six.text_type func.

INCR-441

lms/djangoapps/commerce/api/urls.py

@@ -1,6 +1,8 @@
 """
 API URLs.
 """
+from __future__ import absolute_import
+
 from django.conf.urls import include, url
 
 app_name = 'commerce'

lms/djangoapps/commerce/api/v0/tests/test_views.py

@@ -1,4 +1,6 @@
 """ Commerce API v0 view tests. """
+from __future__ import absolute_import
+
 import itertools
 import json
 from datetime import datetime, timedelta
@@ -7,10 +9,11 @@ from uuid import uuid4
 import ddt
 import mock
 import pytz
+import six
 from django.conf import settings
-from django.urls import reverse, reverse_lazy
 from django.test import TestCase
 from django.test.utils import override_settings
+from django.urls import reverse, reverse_lazy
 
 from course_modes.models import CourseMode
 from course_modes.tests.factories import CourseModeFactory
@@ -50,7 +53,7 @@ class BasketsViewTests(EnrollmentEventTestMixin, UserMixin, ModuleStoreTestCase)
         :return: Response
         """
         payload = {
-            "course_id": unicode(course_id or self.course.id)
+            "course_id": six.text_type(course_id or self.course.id)
         }
         if marketing_email_opt_in:
             payload["email_opt_in"] = True
@@ -249,7 +252,7 @@ class BasketsViewTests(EnrollmentEventTestMixin, UserMixin, ModuleStoreTestCase)
         CourseEnrollment.enroll(self.user, self.course.id)
         CourseEnrollment.unenroll(self.user, self.course.id, True)
         self.assertFalse(CourseEnrollment.is_enrolled(self.user, self.course.id))
-        self.assertIsNotNone(get_enrollment(self.user.username, unicode(self.course.id)))
+        self.assertIsNotNone(get_enrollment(self.user.username, six.text_type(self.course.id)))
 
     @mock.patch('lms.djangoapps.commerce.api.v0.views.update_email_opt_in')
     @ddt.data(*itertools.product((False, True), (False, True), (False, True)))

lms/djangoapps/commerce/api/v0/urls.py

@@ -1,6 +1,8 @@
 """
 API v0 URLs.
 """
+from __future__ import absolute_import
+
 from django.conf.urls import include, url
 
 from . import views

lms/djangoapps/commerce/api/v0/views.py

@@ -1,11 +1,14 @@
 """ API v0 views. """
+from __future__ import absolute_import
+
 import logging
 
+import six
 from django.urls import reverse
 from edx_rest_api_client import exceptions
+from edx_rest_framework_extensions.auth.jwt.authentication import JwtAuthentication
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
-from edx_rest_framework_extensions.auth.jwt.authentication import JwtAuthentication
 from rest_framework.authentication import SessionAuthentication
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.status import HTTP_406_NOT_ACCEPTABLE, HTTP_409_CONFLICT
@@ -67,7 +70,7 @@ class BasketsView(APIView):
 
     def _enroll(self, course_key, user, mode=CourseMode.DEFAULT_MODE_SLUG):
         """ Enroll the user in the course. """
-        add_enrollment(user.username, unicode(course_key), mode)
+        add_enrollment(user.username, six.text_type(course_key), mode)
 
     def _handle_marketing_opt_in(self, request, course_key, user):
         """
@@ -100,7 +103,7 @@ class BasketsView(APIView):
             return embargo_response
 
         # Don't do anything if an enrollment already exists
-        course_id = unicode(course_key)
+        course_id = six.text_type(course_key)
         enrollment = CourseEnrollment.get_enrollment(user, course_key)
         if enrollment and enrollment.is_active:
             msg = Messages.ENROLLMENT_EXISTS.format(course_id=course_id, username=user.username)
@@ -123,7 +126,7 @@ class BasketsView(APIView):
         if CourseEntitlement.check_for_existing_entitlement_and_enroll(user=user, course_run_key=course_key):
             return JsonResponse(
                 {
-                    'redirect_destination': reverse('courseware', args=[unicode(course_id)]),
+                    'redirect_destination': reverse('courseware', args=[six.text_type(course_id)]),
                 },
             )