diff --git a/lms/djangoapps/bulk_email/admin.py b/lms/djangoapps/bulk_email/admin.py
index 3f6f05e5f1..9ac288b4c8 100644
--- a/lms/djangoapps/bulk_email/admin.py
+++ b/lms/djangoapps/bulk_email/admin.py
@@ -1,6 +1,8 @@
 """
 Django admin page for bulk email models
 """
+from __future__ import absolute_import
+
 from config_models.admin import ConfigurationModelAdmin
 from django.contrib import admin
 
@@ -79,6 +81,7 @@ To enable email for the course, check the "Email enabled" box, then click "Save"
         }),
     )
 
+
 admin.site.register(CourseEmail, CourseEmailAdmin)
 admin.site.register(Optout, OptoutAdmin)
 admin.site.register(CourseEmailTemplate, CourseEmailTemplateAdmin)
diff --git a/lms/djangoapps/bulk_email/models.py b/lms/djangoapps/bulk_email/models.py
index 630e12f99d..46df9b2538 100644
--- a/lms/djangoapps/bulk_email/models.py
+++ b/lms/djangoapps/bulk_email/models.py
@@ -1,14 +1,18 @@
 """
 Models for bulk email
 """
+from __future__ import absolute_import
+
 import logging
 
 import markupsafe
+import six
 from config_models.models import ConfigurationModel
 from django.contrib.auth.models import User
 from django.db import models
 from opaque_keys.edx.django.models import CourseKeyField
 from six import text_type
+from six.moves import zip
 
 from course_modes.models import CourseMode
 from openedx.core.djangoapps.course_groups.cohorts import get_cohort_by_name
@@ -49,10 +53,10 @@ SEND_TO_STAFF = 'staff'
 SEND_TO_LEARNERS = 'learners'
 SEND_TO_COHORT = 'cohort'
 SEND_TO_TRACK = 'track'
-EMAIL_TARGET_CHOICES = zip(
+EMAIL_TARGET_CHOICES = list(zip(
     [SEND_TO_MYSELF, SEND_TO_STAFF, SEND_TO_LEARNERS, SEND_TO_COHORT, SEND_TO_TRACK],
     ['Myself', 'Staff and instructors', 'All students', 'Specific cohort', 'Specific course mode']
-)
+))
 EMAIL_TARGETS = {target[0] for target in EMAIL_TARGET_CHOICES}
 
 
@@ -221,7 +225,7 @@ class CourseModeTarget(Target):
         if mode_slug is None:
             raise ValueError("Cannot create a CourseModeTarget without specifying a mode_slug.")
         try:
-            validate_course_mode(unicode(course_id), mode_slug, include_expired=True)
+            validate_course_mode(six.text_type(course_id), mode_slug, include_expired=True)
         except CourseModeNotFoundError:
             raise ValueError(
                 u"Track {track} does not exist in course {course_id}".format(
@@ -419,8 +423,8 @@ class CourseEmailTemplate(models.Model):
         stored HTML template and the provided `context` dict.
         """
         # HTML-escape string values in the context (used for keyword substitution).
-        for key, value in context.iteritems():
-            if isinstance(value, basestring):
+        for key, value in six.iteritems(context):
+            if isinstance(value, six.string_types):
                 context[key] = markupsafe.escape(value)
         return CourseEmailTemplate._render(self.html_template, htmltext, context)
 
@@ -458,17 +462,11 @@ class CourseAuthorization(models.Model):
         return u"Course '{}': Instructor Email {}Enabled".format(text_type(self.course_id), not_en)
 
 
-# .. toggle_name: require_course_email_auth
-# .. toggle_type: ConfigurationModel
-# .. toggle_default: True (enabled)
-# .. toggle_description: If the flag is enabled, course-specific authorization is required, and the course_id is either not provided or not authorixed, the feature is not available.
-# .. toggle_category: bulk email
-# .. toggle_use_cases: open_edx
-# .. toggle_creation_date: 2016-05-05
-# .. toggle_expiration_date: None
-# .. toggle_warnings: None
-# .. toggle_tickets: None
-# .. toggle_status: supported
+# .. toggle_name: require_course_email_auth .. toggle_type: ConfigurationModel .. toggle_default: True (enabled) ..
+# toggle_description: If the flag is enabled, course-specific authorization is required, and the course_id is either
+# not provided or not authorixed, the feature is not available. .. toggle_category: bulk email .. toggle_use_cases:
+# open_edx .. toggle_creation_date: 2016-05-05 .. toggle_expiration_date: None .. toggle_warnings: None ..
+# toggle_tickets: None .. toggle_status: supported
 class BulkEmailFlag(ConfigurationModel):
     """
     Enables site-wide configuration for the bulk_email feature.
diff --git a/lms/djangoapps/bulk_email/policies.py b/lms/djangoapps/bulk_email/policies.py
index 74259ba7a0..f8589ae918 100644
--- a/lms/djangoapps/bulk_email/policies.py
+++ b/lms/djangoapps/bulk_email/policies.py
@@ -1,6 +1,8 @@
+"""Course Email optOut Policy"""
+from __future__ import absolute_import
 
-from edx_ace.policy import Policy, PolicyResult
 from edx_ace.channel import ChannelType
+from edx_ace.policy import Policy, PolicyResult
 from opaque_keys.edx.keys import CourseKey
 
 from bulk_email.models import Optout
@@ -13,6 +15,7 @@ class CourseEmailOptout(Policy):
         if not course_ids:
             return PolicyResult(deny=frozenset())
 
+        # pylint: disable=line-too-long
         course_keys = [CourseKey.from_string(course_id) for course_id in course_ids]
         if Optout.objects.filter(user__username=message.recipient.username, course_id__in=course_keys).count() == len(course_keys):
             return PolicyResult(deny={ChannelType.EMAIL})
diff --git a/lms/djangoapps/bulk_email/tasks.py b/lms/djangoapps/bulk_email/tasks.py
index 5b353f0ff9..106d600797 100644
--- a/lms/djangoapps/bulk_email/tasks.py
+++ b/lms/djangoapps/bulk_email/tasks.py
@@ -3,6 +3,8 @@
 This module contains celery task functions for handling the sending of bulk email
 to a course.
 """
+from __future__ import absolute_import
+
 import json
 import logging
 import random
@@ -25,8 +27,6 @@ from boto.ses.exceptions import (
     SESLocalAddressCharacterError,
     SESMaxSendingRateExceededError
 )
-from util.string_utils import _has_non_ascii_characters
-
 from celery import current_task, task
 from celery.exceptions import RetryTaskError
 from celery.states import FAILURE, RETRY, SUCCESS
@@ -52,6 +52,7 @@ from lms.djangoapps.instructor_task.subtasks import (
 from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
 from openedx.core.lib.courses import course_image_url
 from util.date_utils import get_default_time_display
+from util.string_utils import _has_non_ascii_characters
 
 log = logging.getLogger('edx.celery.task')
 
diff --git a/lms/djangoapps/verify_student/image.py b/lms/djangoapps/verify_student/image.py
index a733da6ca6..d672f8a69c 100644
--- a/lms/djangoapps/verify_student/image.py
+++ b/lms/djangoapps/verify_student/image.py
@@ -1,6 +1,8 @@
 """
 Image encoding helpers for the verification app.
 """
+from __future__ import absolute_import
+
 import logging
 
 log = logging.getLogger(__name__)
diff --git a/lms/djangoapps/verify_student/signals.py b/lms/djangoapps/verify_student/signals.py
index 5d4d2f4c80..a5c8062681 100644
--- a/lms/djangoapps/verify_student/signals.py
+++ b/lms/djangoapps/verify_student/signals.py
@@ -1,6 +1,8 @@
 """
 Signal handler for setting default course verification dates
 """
+from __future__ import absolute_import
+
 from django.core.exceptions import ObjectDoesNotExist
 from django.dispatch.dispatcher import receiver
 
diff --git a/lms/djangoapps/verify_student/ssencrypt.py b/lms/djangoapps/verify_student/ssencrypt.py
index e7aeeba37f..65ad66bb74 100644
--- a/lms/djangoapps/verify_student/ssencrypt.py
+++ b/lms/djangoapps/verify_student/ssencrypt.py
@@ -15,7 +15,7 @@ An RSA private key can be in any of the following formats:
 * PKCS#1 RSAPrivateKey DER SEQUENCE (binary or PEM encoding)
 * PKCS#8 PrivateKeyInfo DER SEQUENCE (binary or PEM encoding)
 """
-from __future__ import division
+from __future__ import absolute_import, division
 
 import base64
 import binascii
@@ -23,7 +23,6 @@ import hmac
 import logging
 import os
 from hashlib import md5, sha256
-from six import text_type
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives import serialization
@@ -33,6 +32,7 @@ from cryptography.hazmat.primitives.ciphers.algorithms import AES
 from cryptography.hazmat.primitives.ciphers.modes import CBC
 from cryptography.hazmat.primitives.hashes import SHA1
 from cryptography.hazmat.primitives.padding import PKCS7
+from six import text_type
 
 log = logging.getLogger(__name__)
 
diff --git a/lms/djangoapps/verify_student/views.py b/lms/djangoapps/verify_student/views.py
index d194fb3f24..9dec48b2f8 100644
--- a/lms/djangoapps/verify_student/views.py
+++ b/lms/djangoapps/verify_student/views.py
@@ -2,12 +2,18 @@
 Views for the verification flow
 """
 
+from __future__ import absolute_import
+
 import datetime
 import decimal
 import json
 import logging
-import urllib
 
+import six
+import six.moves.urllib.error  # pylint: disable=import-error
+import six.moves.urllib.parse  # pylint: disable=import-error
+import six.moves.urllib.request  # pylint: disable=import-error
+from course_modes.models import CourseMode
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.contrib.staticfiles.storage import staticfiles_storage
@@ -24,13 +30,18 @@ from django.views.decorators.csrf import csrf_exempt
 from django.views.decorators.http import require_POST
 from django.views.generic.base import View
 from edx_rest_api_client.exceptions import SlumberBaseException
-from eventtracking import tracker
+from edxmako.shortcuts import render_to_response, render_to_string
 from ipware.ip import get_ip
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
+from shoppingcart.models import CertificateItem, Order
+from shoppingcart.processors import get_purchase_endpoint, get_signed_purchase_params
+from student.models import CourseEnrollment
+from track import segment
+from util.db import outer_atomic
+from util.json_request import JsonResponse
+from xmodule.modulestore.django import modulestore
 
-from course_modes.models import CourseMode
-from edxmako.shortcuts import render_to_response, render_to_string
 from lms.djangoapps.commerce.utils import EcommerceService, is_account_activation_requirement_disabled
 from lms.djangoapps.verify_student.image import InvalidImageData, decode_image_data
 from lms.djangoapps.verify_student.models import SoftwareSecurePhotoVerification, VerificationDeadline
@@ -45,13 +56,6 @@ from openedx.core.djangoapps.user_api.accounts import NAME_MIN_LENGTH
 from openedx.core.djangoapps.user_api.accounts.api import update_account_settings
 from openedx.core.djangoapps.user_api.errors import AccountValidationError, UserNotFound
 from openedx.core.lib.log_utils import audit_log
-from shoppingcart.models import CertificateItem, Order
-from shoppingcart.processors import get_purchase_endpoint, get_signed_purchase_params
-from student.models import CourseEnrollment
-from track import segment
-from util.db import outer_atomic
-from util.json_request import JsonResponse
-from xmodule.modulestore.django import modulestore
 
 log = logging.getLogger(__name__)
 
@@ -379,7 +383,7 @@ class PayAndVerifyView(View):
         if not course.start or course.start < now():
             courseware_url = reverse(
                 'course_root',
-                kwargs={'course_id': unicode(course_key)}
+                kwargs={'course_id': six.text_type(course_key)}
             )
 
         full_name = (
@@ -392,7 +396,7 @@ class PayAndVerifyView(View):
         # use that amount to pre-fill the price selection form.
         contribution_amount = request.session.get(
             'donation_for_course', {}
-        ).get(unicode(course_key), '')
+        ).get(six.text_type(course_key), '')
 
         # Remember whether the user is upgrading
         # so we can fire an analytics event upon payment.
@@ -413,7 +417,7 @@ class PayAndVerifyView(View):
         context = {
             'contribution_amount': contribution_amount,
             'course': course,
-            'course_key': unicode(course_key),
+            'course_key': six.text_type(course_key),
             'checkpoint_location': request.GET.get('checkpoint'),
             'course_mode': relevant_course_mode,
             'courseware_url': courseware_url,
@@ -441,10 +445,10 @@ class PayAndVerifyView(View):
         # utm_params is [(u'utm_content', u'course-v1:IDBx IDB20.1x 1T2017'),...
         utm_params = [item for item in self.request.GET.items() if 'utm_' in item[0]]
         # utm_params is utm_content=course-v1%3AIDBx+IDB20.1x+1T2017&...
-        utm_params = urllib.urlencode(utm_params, True)
+        utm_params = six.moves.urllib.parse.urlencode(utm_params, True)  # pylint: disable=too-many-function-args
         # utm_params is utm_content=course-v1:IDBx+IDB20.1x+1T2017&...
         # (course-keys do not have url encoding)
-        utm_params = urllib.unquote(utm_params)
+        utm_params = six.moves.urllib.parse.unquote(utm_params)  # pylint: disable=too-many-function-args
         if utm_params:
             if '?' in url:
                 url = url + '&' + utm_params
@@ -453,8 +457,8 @@ class PayAndVerifyView(View):
         return url
 
     def _redirect_if_necessary(
-            self, message, already_verified, already_paid, is_enrolled, course_key,
-            user_is_trying_to_pay, user, sku
+        self, message, already_verified, already_paid, is_enrolled, course_key,
+        user_is_trying_to_pay, user, sku
     ):
         """Redirect the user to a more appropriate page if necessary.
 
@@ -488,7 +492,7 @@ class PayAndVerifyView(View):
 
         """
         url = None
-        course_kwargs = {'course_id': unicode(course_key)}
+        course_kwargs = {'course_id': six.text_type(course_key)}
 
         if already_verified and already_paid:
             # If they've already paid and verified, there's nothing else to do,
@@ -597,7 +601,7 @@ class PayAndVerifyView(View):
         return [
             {
                 'name': step,
-                'title': unicode(self.STEP_TITLES[step]),
+                'title': six.text_type(self.STEP_TITLES[step]),
             }
             for step in display_steps
             if step not in remove_steps
@@ -631,7 +635,7 @@ class PayAndVerifyView(View):
 
         display_steps = set(step['name'] for step in display_steps)
 
-        for step, step_requirements in self.STEP_REQUIREMENTS.iteritems():
+        for step, step_requirements in six.iteritems(self.STEP_REQUIREMENTS):
             if step in display_steps:
                 for requirement in step_requirements:
                     all_requirements[requirement] = True
@@ -729,7 +733,7 @@ class PayAndVerifyView(View):
 
 def checkout_with_ecommerce_service(user, course_key, course_mode, processor):
     """ Create a new basket and trigger immediate checkout, using the E-Commerce API. """
-    course_id = unicode(course_key)
+    course_id = six.text_type(course_key)
     try:
         api = ecommerce_api_client(user)
         # Make an API call to create the order and retrieve the results
@@ -781,7 +785,7 @@ def checkout_with_shoppingcart(request, user, course_key, course_mode, amount):
         'payment_form_data': get_signed_purchase_params(
             cart,
             callback_url=callback_url,
-            extra_data=[unicode(course_key), course_mode.slug]
+            extra_data=[six.text_type(course_key), course_mode.slug]
         ),
     }
     return payment_data
@@ -798,7 +802,7 @@ def create_order(request):
     course_id = request.POST['course_id']
     course_id = CourseKey.from_string(course_id)
     donation_for_course = request.session.get('donation_for_course', {})
-    contribution = request.POST.get("contribution", donation_for_course.get(unicode(course_id), 0))
+    contribution = request.POST.get("contribution", donation_for_course.get(six.text_type(course_id), 0))
     try:
         amount = decimal.Decimal(contribution).quantize(decimal.Decimal('.01'), rounding=decimal.ROUND_DOWN)
     except decimal.InvalidOperation:
@@ -1135,7 +1139,7 @@ def results_callback(request):
     access_key = access_key_and_sig.split(":")[0]
 
     # This is what we should be doing...
-    #if not sig_valid:
+    # if not sig_valid:
     #    return HttpResponseBadRequest("Signature is invalid")
 
     # This is what we're doing until we can figure out why we disagree on sigs
@@ -1237,6 +1241,7 @@ class ReverifyView(View):
     the user submitted during initial verification.
 
     """
+
     @method_decorator(login_required)
     def get(self, request):
         """