Remove start index 0 in range()

Remove the useless arg ("start index" = 0) in files, since its default
value is 0, to make code cleaner.

Change-Id: I9d91ab8a8033b9a6c9b77608dea92c91a994c7fc

glance/db/sqlalchemy/api.py

@@ -497,9 +497,9 @@ def _paginate_query(query, model, limit, sort_keys, marker=None,
 
         # Build up an array of sort criteria as in the docstring
         criteria_list = []
-        for i in xrange(0, len(sort_keys)):
+        for i in xrange(len(sort_keys)):
             crit_attrs = []
-            for j in xrange(0, i):
+            for j in xrange(i):
                 model_attr = getattr(model, sort_keys[j])
                 attr = sa_sql.expression.case([(model_attr != None,
                                               model_attr), ],

glance/tests/functional/__init__.py

@@ -718,7 +718,7 @@ class FunctionalTest(test_utils.BaseTestCase):
                             to exit in a timely fashion
         """
         launch_msg = None
-        for i in range(0, max_retries):
+        for i in range(max_retries):
             exitcode, out, err = server.start(expect_exit=not expect_launch,
                                               **kwargs)
             name = server.server_name

glance/tests/functional/test_bin_glance_cache_manage.py

@@ -134,7 +134,7 @@ class TestBinGlanceCacheManage(functional.FunctionalTest):
 
         # Add a few images and cache the second one of them
         # by GETing the image...
-        for x in xrange(0, 4):
+        for x in xrange(4):
             ids[x] = self.add_image("Image%s" % x)
 
         path = "http://%s:%d/v1/images/%s" % ("127.0.0.1", api_port,
@@ -181,7 +181,7 @@ class TestBinGlanceCacheManage(functional.FunctionalTest):
 
         # Add a few images and cache the second one of them
         # by GETing the image...
-        for x in xrange(0, 4):
+        for x in xrange(4):
             ids[x] = self.add_image("Image%s" % x)
 
         # Queue second image and then cache it
@@ -279,7 +279,7 @@ log_file = %(log_file)s
         self.assertTrue('No queued images' in out.strip())
 
         # Queue all images
-        for x in xrange(0, 4):
+        for x in xrange(4):
             cmd = ("%s --port=%d --force "
                    "queue-image %s") % (exe_cmd, api_port, ids[x])
 

glance/tests/functional/test_cache_middleware.py

@@ -414,7 +414,7 @@ class BaseCacheManageMiddlewareTest(object):
         ids = {}
 
         # Add a bunch of images...
-        for x in xrange(0, 4):
+        for x in xrange(4):
             ids[x] = self.add_image("Image%s" % str(x))
 
         # Verify no images in cached_images because no image has been hit
@@ -422,7 +422,7 @@ class BaseCacheManageMiddlewareTest(object):
         self.verify_no_cached_images()
 
         # Grab the images, essentially caching them...
-        for x in xrange(0, 4):
+        for x in xrange(4):
             path = "http://%s:%d/v1/images/%s" % ("127.0.0.1", self.api_port,
                                                   ids[x])
             http = httplib2.Http()
@@ -498,7 +498,7 @@ class BaseCacheManageMiddlewareTest(object):
         NUM_IMAGES = 4
 
         # Add and then queue some images
-        for x in xrange(0, NUM_IMAGES):
+        for x in xrange(NUM_IMAGES):
             ids[x] = self.add_image("Image%s" % str(x))
             path = "http://%s:%d/v1/queued_images/%s" % ("127.0.0.1",
                                                          self.api_port, ids[x])
@@ -562,7 +562,7 @@ log_file = %(log_file)s
         ids = {}
 
         # Add a bunch of images...
-        for x in xrange(0, 4):
+        for x in xrange(4):
             ids[x] = self.add_image("Image%s" % str(x))
 
         # Queue the first image, verify no images still in cache after queueing

glance/tests/functional/v1/test_multiprocessing.py

@@ -63,7 +63,7 @@ class TestMultiprocessing(functional.FunctionalTest):
         cmd = "kill -INT %s" % ' '.join(children)
         execute(cmd, raise_error=True)
 
-        for _ in range(0, 9):
+        for _ in range(9):
             # Yeah. This totally isn't a race condition. Randomly fails
             # set at 0.05. Works most of the time at 0.10
             time.sleep(0.10)

glance/tests/unit/test_image_cache.py

@@ -160,7 +160,7 @@ class ImageCacheTestCase(object):
         # prune it. We should see only 5 images left after
         # pruning, and the images that are least recently accessed
         # should be the ones pruned...
-        for x in xrange(0, 10):
+        for x in xrange(10):
             FIXTURE_FILE = StringIO.StringIO(FIXTURE_DATA)
             self.assertTrue(self.cache.cache_image_file(x,
                                                         FIXTURE_FILE))
@@ -168,7 +168,7 @@ class ImageCacheTestCase(object):
         self.assertEqual(10 * 1024, self.cache.get_cache_size())
 
         # OK, hit the images that are now cached...
-        for x in xrange(0, 10):
+        for x in xrange(10):
             buff = StringIO.StringIO()
             with self.cache.open_for_read(x) as cache_file:
                 for chunk in cache_file:
@@ -245,7 +245,7 @@ class ImageCacheTestCase(object):
 
         self.cache.delete_cached_image(1)
 
-        for x in xrange(0, 3):
+        for x in xrange(3):
             self.assertTrue(self.cache.queue_image(x))
 
         self.assertEqual(self.cache.get_queued_images(),