Use the six library for compatability

Replace dict.iteritems() with six.iteritems(dict)
Import six for StringIO
Import urlutils for urlencode

Partial implement: blueprint py33-support

Change-Id: Ieae1299915168ef10ff54e0a9e9a346350e9d1fb

heatclient/common/base.py

@@ -18,6 +18,7 @@ Base utilities to build API operation managers and objects on top of.
 """
 
 import copy
+import six
 
 
 # Python 2.4 compat
@@ -86,7 +87,7 @@ class Resource(object):
         self._loaded = loaded
 
     def _add_details(self, info):
-        for (k, v) in info.iteritems():
+        for (k, v) in six.iteritems(info):
             setattr(self, k, v)
 
     def __getattr__(self, k):

heatclient/tests/test_shell.py

@@ -11,10 +11,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import cStringIO
 import httplib2
 import os
 import re
+import six
 import sys
 import urllib2
 import yaml
@@ -64,7 +64,7 @@ class TestCase(testtools.TestCase):
     def shell_error(self, argstr, error_match):
         orig = sys.stderr
         try:
-            sys.stderr = cStringIO.StringIO()
+            sys.stderr = six.StringIO()
             _shell = heatclient.shell.HeatShell()
             _shell.main(argstr.split())
         except Exception as e:
@@ -224,7 +224,7 @@ class ShellTest(TestCase):
     def shell(self, argstr):
         orig = sys.stdout
         try:
-            sys.stdout = cStringIO.StringIO()
+            sys.stdout = six.StringIO()
             _shell = heatclient.shell.HeatShell()
             _shell.main(argstr.split())
         except SystemExit:
@@ -654,7 +654,7 @@ class ShellEnvironmentTest(TestCase):
         fields = {'files': {}}
         if url:
             self.m.StubOutWithMock(urllib2, 'urlopen')
-            urllib2.urlopen(url).AndReturn(cStringIO.StringIO(content))
+            urllib2.urlopen(url).AndReturn(six.StringIO(content))
             self.m.ReplayAll()
 
         v1shell._resolve_environment_urls(fields, env_base_url, jenv)

heatclient/v1/stacks.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import urllib
+from heatclient.openstack.common.py3kcompat import urlutils
 
 from heatclient.common import base
 
@@ -72,7 +72,7 @@ class StackManager(base.Manager):
         absolute_limit = kwargs.get('limit')
 
         def paginate(qp, seen=0):
-            url = '/stacks?%s' % urllib.urlencode(qp)
+            url = '/stacks?%s' % urlutils.urlencode(qp)
 
             stacks = self._list(url, "stacks")
             for stack in stacks: