Clean imports in code

This patch set modifies lines which are importing objects
instead of modules. As per openstack import guide lines, user should
import modules in a file not objects.

http://docs.openstack.org/developer/hacking/#imports

Change-Id: I7525672d64a3bc5df2dc6bdbf19da5b1d6c9dc1e

5 files changed, 27 insertions, 29 deletions

diff --git a/glance_store/_drivers/swift/utils.py b/glance_store/_drivers/swift/utils.py
index 11ddce4..642f787 100644
--- a/glance_store/_drivers/swift/utils.py
+++ b/glance_store/_drivers/swift/utils.py
@@ -14,7 +14,7 @@
 
 import logging
 
-from collections import OrderedDict
+import collections
 
 from oslo_config import cfg
 from six.moves import configparser
@@ -105,7 +105,7 @@ _config_defaults = {'user_domain_id': 'default',
 # NOTE(bourke): The default dict_type is collections.OrderedDict in py27, but
 # we must set manually for compatibility with py26
 CONFIG = configparser.SafeConfigParser(defaults=_config_defaults,
-                                       dict_type=OrderedDict)
+                                       dict_type=collections.OrderedDict)
 LOG = logging.getLogger(__name__)
 
 
diff --git a/glance_store/tests/unit/test_filesystem_store.py b/glance_store/tests/unit/test_filesystem_store.py
index 258a81e..222d760 100644
--- a/glance_store/tests/unit/test_filesystem_store.py
+++ b/glance_store/tests/unit/test_filesystem_store.py
@@ -30,8 +30,7 @@ from six.moves import builtins
 # NOTE(jokke): simplified transition to py3, behaves like py2 xrange
 from six.moves import range
 
-from glance_store._drivers.filesystem import ChunkedFile
-from glance_store._drivers.filesystem import Store
+from glance_store._drivers import filesystem
 from glance_store import exceptions
 from glance_store import location
 from glance_store.tests import base
@@ -44,9 +43,9 @@ class TestStore(base.StoreBaseTest,
     def setUp(self):
         """Establish a clean test environment."""
         super(TestStore, self).setUp()
-        self.orig_chunksize = Store.READ_CHUNKSIZE
-        Store.READ_CHUNKSIZE = 10
-        self.store = Store(self.conf)
+        self.orig_chunksize = filesystem.Store.READ_CHUNKSIZE
+        filesystem.Store.READ_CHUNKSIZE = 10
+        self.store = filesystem.Store(self.conf)
         self.config(filesystem_store_datadir=self.test_dir,
                     stores=['glance.store.filesystem.Store'],
                     group="glance_store")
@@ -56,7 +55,7 @@ class TestStore(base.StoreBaseTest,
     def tearDown(self):
         """Clear the test environment."""
         super(TestStore, self).tearDown()
-        ChunkedFile.CHUNKSIZE = self.orig_chunksize
+        filesystem.ChunkedFile.CHUNKSIZE = self.orig_chunksize
 
     def _create_metadata_json_file(self, metadata):
         expected_image_id = str(uuid.uuid4())
@@ -153,7 +152,7 @@ class TestStore(base.StoreBaseTest,
 
     def test_add(self):
         """Test that we can add an image via the filesystem backend."""
-        ChunkedFile.CHUNKSIZE = units.Ki
+        filesystem.ChunkedFile.CHUNKSIZE = units.Ki
         expected_image_id = str(uuid.uuid4())
         expected_file_size = 5 * units.Ki  # 5K
         expected_file_contents = b"*" * expected_file_size
@@ -236,7 +235,7 @@ class TestStore(base.StoreBaseTest,
         Tests that adding an image with an existing identifier
         raises an appropriate exception
         """
-        ChunkedFile.CHUNKSIZE = units.Ki
+        filesystem.ChunkedFile.CHUNKSIZE = units.Ki
         image_id = str(uuid.uuid4())
         file_size = 5 * units.Ki  # 5K
         file_contents = b"*" * file_size
@@ -251,7 +250,7 @@ class TestStore(base.StoreBaseTest,
                           image_id, image_file, 0)
 
     def _do_test_add_write_failure(self, errno, exception):
-        ChunkedFile.CHUNKSIZE = units.Ki
+        filesystem.ChunkedFile.CHUNKSIZE = units.Ki
         image_id = str(uuid.uuid4())
         file_size = 5 * units.Ki  # 5K
         file_contents = b"*" * file_size
@@ -302,7 +301,7 @@ class TestStore(base.StoreBaseTest,
         Tests the partial image file is cleaned up after a read
         failure.
         """
-        ChunkedFile.CHUNKSIZE = units.Ki
+        filesystem.ChunkedFile.CHUNKSIZE = units.Ki
         image_id = str(uuid.uuid4())
         file_size = 5 * units.Ki  # 5K
         file_contents = b"*" * file_size
@@ -519,7 +518,7 @@ class TestStore(base.StoreBaseTest,
             self.fail("configure() raised BadStoreConfiguration unexpectedly!")
 
         # Test that we can add an image via the filesystem backend
-        ChunkedFile.CHUNKSIZE = 1024
+        filesystem.ChunkedFile.CHUNKSIZE = 1024
         expected_image_id = str(uuid.uuid4())
         expected_file_size = 5 * units.Ki  # 5K
         expected_file_contents = b"*" * expected_file_size
@@ -565,7 +564,7 @@ class TestStore(base.StoreBaseTest,
         self.store.configure()
 
         # Test that we can add an image via the filesystem backend
-        ChunkedFile.CHUNKSIZE = units.Ki
+        filesystem.ChunkedFile.CHUNKSIZE = units.Ki
         expected_image_id = str(uuid.uuid4())
         expected_file_size = 5 * units.Ki  # 5K
         expected_file_contents = b"*" * expected_file_size
@@ -618,7 +617,7 @@ class TestStore(base.StoreBaseTest,
         with mock.patch.object(self.store, '_get_capacity_info') as capacity:
             capacity.return_value = 0
 
-            ChunkedFile.CHUNKSIZE = units.Ki
+            filesystem.ChunkedFile.CHUNKSIZE = units.Ki
             expected_image_id = str(uuid.uuid4())
             expected_file_size = 5 * units.Ki  # 5K
             expected_file_contents = b"*" * expected_file_size
@@ -671,7 +670,7 @@ class TestStore(base.StoreBaseTest,
 
         self.store.configure_add()
 
-        Store.WRITE_CHUNKSIZE = units.Ki
+        filesystem.Store.WRITE_CHUNKSIZE = units.Ki
         expected_image_id = str(uuid.uuid4())
         expected_file_size = 5 * units.Ki  # 5K
         expected_file_contents = b"*" * expected_file_size
@@ -712,7 +711,7 @@ class TestStore(base.StoreBaseTest,
 
         self.store.configure_add()
 
-        Store.WRITE_CHUNKSIZE = units.Ki
+        filesystem.Store.WRITE_CHUNKSIZE = units.Ki
         expected_image_id = str(uuid.uuid4())
         expected_file_size = 5 * units.Ki  # 5K
         expected_file_contents = b"*" * expected_file_size
diff --git a/glance_store/tests/unit/test_rbd_store.py b/glance_store/tests/unit/test_rbd_store.py
index d51237e..b4294aa 100644
--- a/glance_store/tests/unit/test_rbd_store.py
+++ b/glance_store/tests/unit/test_rbd_store.py
@@ -19,7 +19,7 @@ import six
 
 from glance_store._drivers import rbd as rbd_store
 from glance_store import exceptions
-from glance_store.location import Location
+from glance_store import location as g_location
 from glance_store.tests import base
 from glance_store.tests.unit import test_store_capabilities
 
@@ -248,10 +248,10 @@ class TestStore(base.StoreBaseTest,
         with mock.patch.object(MockRBD.RBD, 'remove') as remove_image:
             remove_image.side_effect = _fake_remove
 
-            self.store.delete(Location('test_rbd_store',
-                                       rbd_store.StoreLocation,
-                                       self.conf,
-                                       uri=self.location.get_uri()))
+            self.store.delete(g_location.Location('test_rbd_store',
+                                                  rbd_store.StoreLocation,
+                                                  self.conf,
+                                                  uri=self.location.get_uri()))
             self.called_commands_expected = ['remove']
 
     def test_delete_image(self):
@@ -326,8 +326,8 @@ class TestStore(base.StoreBaseTest,
             self.called_commands_expected = ['remove']
 
     def test_get_partial_image(self):
-        loc = Location('test_rbd_store', rbd_store.StoreLocation, self.conf,
-                       store_specs=self.store_specs)
+        loc = g_location.Location('test_rbd_store', rbd_store.StoreLocation,
+                                  self.conf, store_specs=self.store_specs)
         self.assertRaises(exceptions.StoreRandomGetNotSupported,
                           self.store.get, loc, chunk_size=1)
 
diff --git a/glance_store/tests/unit/test_swift_store.py b/glance_store/tests/unit/test_swift_store.py
index e30febe..f82376d 100644
--- a/glance_store/tests/unit/test_swift_store.py
+++ b/glance_store/tests/unit/test_swift_store.py
@@ -37,7 +37,6 @@ import swiftclient
 from glance_store._drivers.swift import store as swift
 from glance_store._drivers.swift import utils as sutils
 from glance_store import backend
-from glance_store import BackendException
 from glance_store import capabilities
 from glance_store import exceptions
 from glance_store import location
@@ -483,7 +482,7 @@ class SwiftTests(object):
         exception_caught = False
         try:
             self.store.add(str(uuid.uuid4()), image_swift, 0)
-        except BackendException as e:
+        except exceptions.BackendException as e:
             exception_caught = True
             self.assertIn("container noexist does not exist in Swift",
                           encodeutils.exception_to_unicode(e))
@@ -615,7 +614,7 @@ class SwiftTests(object):
         exception_caught = False
         try:
             self.store.add(expected_image_id, image_swift, 0)
-        except BackendException as e:
+        except exceptions.BackendException as e:
             exception_caught = True
             expected_msg = "container %s does not exist in Swift"
             expected_msg = expected_msg % expected_container
diff --git a/glance_store/tests/unit/test_vmware_store.py b/glance_store/tests/unit/test_vmware_store.py
index c77b9fd..03964bd 100644
--- a/glance_store/tests/unit/test_vmware_store.py
+++ b/glance_store/tests/unit/test_vmware_store.py
@@ -21,7 +21,7 @@ import uuid
 import mock
 from oslo_utils import units
 from oslo_vmware import api
-from oslo_vmware.exceptions import FileNotFoundException
+from oslo_vmware import exceptions as vmware_exceptions
 from oslo_vmware.objects import datacenter as oslo_datacenter
 from oslo_vmware.objects import datastore as oslo_datastore
 import six
@@ -256,7 +256,7 @@ class TestStore(base.StoreBaseTest,
             "dsName=ds1&dcPath=dc1" % FAKE_UUID, conf=self.conf)
         with mock.patch.object(self.store.session,
                                'wait_for_task') as mock_task:
-            mock_task.side_effect = FileNotFoundException
+            mock_task.side_effect = vmware_exceptions.FileNotFoundException
             self.assertRaises(exceptions.NotFound, self.store.delete, loc)
 
     @mock.patch('oslo_vmware.api.VMwareAPISession')