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.

Fixes bug #1259750

Change-Id: I52afac28a3248895bb1c012a5934d39e7c2cc5a9

test/functional/swift_test_client.py

@@ -65,7 +65,7 @@ class ResponseError(Exception):
 
 
 def listing_empty(method):
-    for i in xrange(0, 6):
+    for i in xrange(6):
         if len(method()) == 0:
             return True
 

test/unit/common/middleware/test_ratelimit.py

@@ -158,7 +158,7 @@ class TestRateLimit(unittest.TestCase):
     def _run(self, callable_func, num, rate, check_time=True):
         global time_ticker
         begin = time.time()
-        for x in range(0, num):
+        for x in range(num):
             callable_func()
         end = time.time()
         total_time = float(num) / rate - 1.0 / rate  # 1st request not limited

test/unit/obj/test_expirer.py

@@ -157,7 +157,7 @@ class TestObjectExpirer(TestCase):
         x.swift = InternalClient(containers)
 
         deleted_objects = {}
-        for i in xrange(0, 3):
+        for i in xrange(3):
             x.process = i
             x.run_once()
             self.assertNotEqual(deleted_objects, x.deleted_objects)

test/unit/proxy/test_server.py

@@ -6881,7 +6881,7 @@ class TestProxyObjectPerformance(unittest.TestCase):
         self.obj_len = obj_len
 
     def test_GET_debug_large_file(self):
-        for i in range(0, 10):
+        for i in range(10):
             start = time.time()
 
             prolis = _test_sockets[0]