INCR-280 Run python-modernize on lms/djangoapps/commerce/api/v1 (#20579)

* run python modernize

* run isort

* Fix quality

lms/djangoapps/commerce/api/v1/models.py

 """ API v1 models. """
+from __future__ import absolute_import
+
 import logging
 from itertools import groupby
 
+import six
 from django.db import transaction
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
@@ -22,7 +25,7 @@ class Course(object):
     _deleted_modes = None
 
     def __init__(self, id, modes, **kwargs):  # pylint: disable=redefined-builtin
-        self.id = CourseKey.from_string(unicode(id))  # pylint: disable=invalid-name
+        self.id = CourseKey.from_string(six.text_type(id))  # pylint: disable=invalid-name
         self.modes = list(modes)
         self.verification_deadline = UNDEFINED
         if 'verification_deadline' in kwargs:
@@ -32,7 +35,7 @@ class Course(object):
     @property
     def name(self):
         """ Return course name. """
-        course_id = CourseKey.from_string(unicode(self.id))
+        course_id = CourseKey.from_string(six.text_type(self.id))
 
         try:
             return CourseOverview.get_from_id(course_id).display_name
@@ -112,7 +115,7 @@ class Course(object):
     def get(cls, course_id):
         """ Retrieve a single course. """
         try:
-            course_id = CourseKey.from_string(unicode(course_id))
+            course_id = CourseKey.from_string(six.text_type(course_id))
         except InvalidKeyError:
             log.debug(u'[%s] is not a valid course key.', course_id)
             raise ValueError

lms/djangoapps/commerce/api/v1/permissions.py

 """ Custom API permissions. """
 
+from __future__ import absolute_import
+
 from django.contrib.auth.models import User
 from rest_framework.permissions import BasePermission, DjangoModelPermissions
 

lms/djangoapps/commerce/api/v1/serializers.py

 """ API v1 serializers. """
+from __future__ import absolute_import
+
 from datetime import datetime
 
 import pytz
+import six
 from django.utils.translation import ugettext as _
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
@@ -10,7 +13,7 @@ from rest_framework import serializers
 from course_modes.models import CourseMode
 from xmodule.modulestore.django import modulestore
 
-from .models import Course, UNDEFINED
+from .models import UNDEFINED, Course
 
 
 class CourseModeSerializer(serializers.ModelSerializer):
@@ -40,7 +43,7 @@ def validate_course_id(course_id):
     Check that course id is valid and exists in modulestore.
     """
     try:
-        course_key = CourseKey.from_string(unicode(course_id))
+        course_key = CourseKey.from_string(six.text_type(course_id))
     except InvalidKeyError:
         raise serializers.ValidationError(
             _(u"{course_id} is not a valid course key.").format(

lms/djangoapps/commerce/api/v1/tests/test_models.py

 """ Tests for models. """
+from __future__ import absolute_import
+
 import ddt
 from django.test import TestCase
 

lms/djangoapps/commerce/api/v1/tests/test_serializers.py

 """ Commerce API v1 serializer tests. """
+from __future__ import absolute_import
+
 from django.test import TestCase
 
 from ..serializers import serializers, validate_course_id

lms/djangoapps/commerce/api/v1/tests/test_views.py

 """ Commerce API v1 view tests. """
+from __future__ import absolute_import
+
 import itertools
 import json
 from datetime import datetime, timedelta
 
 import ddt
 import pytz
+import six
 from django.conf import settings
 from django.contrib.auth.models import Permission
-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 rest_framework.utils.encoders import JSONEncoder
 
 from course_modes.models import CourseMode
@@ -72,8 +75,8 @@ class CourseApiViewTestMixin(object):
         verification_deadline = verification_deadline or VerificationDeadline.deadline_for_course(course.id)
 
         return {
-            u'id': unicode(course.id),
-            u'name': unicode(course.display_name),
+            u'id': six.text_type(course.id),
+            u'name': six.text_type(course.display_name),
             u'verification_deadline': cls._serialize_datetime(verification_deadline),
             u'modes': [cls._serialize_course_mode(mode) for mode in modes]
         }
@@ -112,7 +115,7 @@ class CourseRetrieveUpdateViewTests(CourseApiViewTestMixin, ModuleStoreTestCase)
 
     def setUp(self):
         super(CourseRetrieveUpdateViewTests, self).setUp()
-        self.path = reverse('commerce_api:v1:courses:retrieve_update', args=[unicode(self.course.id)])
+        self.path = reverse('commerce_api:v1:courses:retrieve_update', args=[six.text_type(self.course.id)])
         self.user = UserFactory.create()
         self.client.login(username=self.user.username, password=PASSWORD)
 
@@ -286,7 +289,7 @@ class CourseRetrieveUpdateViewTests(CourseApiViewTestMixin, ModuleStoreTestCase)
     def test_update_overwrite(self):
         """ Verify that data submitted via PUT overwrites/deletes modes that are
         not included in the body of the request. """
-        course_id = unicode(self.course.id)
+        course_id = six.text_type(self.course.id)
         expected_course_mode = CourseMode(
             mode_slug=u'credit',
             min_price=500,
@@ -323,7 +326,7 @@ class CourseRetrieveUpdateViewTests(CourseApiViewTestMixin, ModuleStoreTestCase)
                 expiration_datetime=expiration_datetime
             )
         )
-        course_id = unicode(self.course.id)
+        course_id = six.text_type(self.course.id)
         payload = {u'id': course_id, u'modes': [mode]}
         path = reverse('commerce_api:v1:courses:retrieve_update', args=[course_id])
 
@@ -351,7 +354,7 @@ class CourseRetrieveUpdateViewTests(CourseApiViewTestMixin, ModuleStoreTestCase)
             )
         ]
         expected = self._serialize_course(course, expected_modes)
-        path = reverse('commerce_api:v1:courses:retrieve_update', args=[unicode(course.id)])
+        path = reverse('commerce_api:v1:courses:retrieve_update', args=[six.text_type(course.id)])
 
         response = self.client.put(path, json.dumps(expected), content_type=JSON_CONTENT_TYPE, **request_kwargs)
         self.assertEqual(response.status_code, 201)
@@ -397,13 +400,13 @@ class CourseRetrieveUpdateViewTests(CourseApiViewTestMixin, ModuleStoreTestCase)
         course_key = 'non/existing/key'
 
         course_dict = {
-            u'id': unicode(course_key),
-            u'name': unicode('Non Existing Course'),
+            u'id': six.text_type(course_key),
+            u'name': six.text_type('Non Existing Course'),
             u'verification_deadline': None,
             u'modes': [self._serialize_course_mode(mode) for mode in expected_modes]
         }
 
-        path = reverse('commerce_api:v1:courses:retrieve_update', args=[unicode(course_key)])
+        path = reverse('commerce_api:v1:courses:retrieve_update', args=[six.text_type(course_key)])
 
         response = self.client.put(path, json.dumps(course_dict), content_type=JSON_CONTENT_TYPE)
         self.assertEqual(response.status_code, 400)

lms/djangoapps/commerce/api/v1/urls.py

+"""
+Commerce URLs
+"""
+from __future__ import absolute_import
+
 from django.conf import settings
 from django.conf.urls import include, url
 

lms/djangoapps/commerce/api/v1/views.py

+"""
+Commerce views
+"""
+from __future__ import absolute_import
+
 import logging
 
 from django.contrib.auth.models import User