Command for certificate whitelist

lms/djangoapps/certificates/management/commands/cert_whitelist.py

 from django.core.management.base import BaseCommand, CommandError
-import os
 from optparse import make_option
-from student.models import UserProfile
 from certificates.models import CertificateWhitelist
 from django.contrib.auth.models import User
 
+
 class Command(BaseCommand):
 
     help = """
@@ -59,7 +58,8 @@ class Command(BaseCommand):
             else:
                 user = User.objects.get(username=user_str)
 
-            cert_whitelist, created  = CertificateWhitelist.objects.get_or_create(
+            cert_whitelist, created = \
+                CertificateWhitelist.objects.get_or_create(
                     user=user, course_id=course_id)
             if options['add']:
                 cert_whitelist.whitelist = True
@@ -69,5 +69,6 @@ class Command(BaseCommand):
 
         whitelist = CertificateWhitelist.objects.all()
         print "User whitelist for course {0}:\n{1}".format(course_id,
-              '\n'.join([ "{0} {1} {2}".format(u.user.username, u.user.email, u.whitelist) for u in whitelist]))
-
+              '\n'.join(["{0} {1} {2}".format(
+                  u.user.username, u.user.email, u.whitelist)
+                  for u in whitelist]))