PEP8 cleanups

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/common/compressed_files.py

@@ -83,7 +83,7 @@ class Archive(object):
         """
         Return a file-like object to a member of the archive
         """
-        raise NotImplemented
+        raise NotImplementedError
 
 
 class TarArchive(Archive):

mayan/apps/common/settings.py

@@ -1,7 +1,6 @@
 from __future__ import unicode_literals
 
 import os
-import tempfile
 
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _

mayan/apps/common/tests/test_views.py

@@ -43,25 +43,25 @@ class CommonViewTestCase(GenericViewTestCase):
         )
 
     def test_object_error_list_view_with_permissions(self):
-            self._create_error_log_entry()
+        self._create_error_log_entry()
 
-            self.grant_access(
-                obj=self.user, permission=permission_error_log_view
-            )
+        self.grant_access(
+            obj=self.user, permission=permission_error_log_view
+        )
 
-            response = self._request_object_error_log_list()
+        response = self._request_object_error_log_list()
 
-            self.assertContains(
-                response=response, text=TEST_ERROR_LOG_ENTRY_RESULT,
-                status_code=200
-            )
+        self.assertContains(
+            response=response, text=TEST_ERROR_LOG_ENTRY_RESULT,
+            status_code=200
+        )
 
     def test_object_error_list_view_no_permissions(self):
-            self._create_error_log_entry()
+        self._create_error_log_entry()
 
-            response = self._request_object_error_log_list()
+        response = self._request_object_error_log_list()
 
-            self.assertNotContains(
-                response=response, text=TEST_ERROR_LOG_ENTRY_RESULT,
-                status_code=403
-            )
+        self.assertNotContains(
+            response=response, text=TEST_ERROR_LOG_ENTRY_RESULT,
+            status_code=403
+        )

mayan/apps/common/utils.py

@@ -1,9 +1,6 @@
 from __future__ import unicode_literals
 
 import logging
-import os
-import shutil
-import tempfile
 import types
 
 from django.conf import settings