Update hacking and fix warning

Change-Id: If1358bcfc3f914956f8917cbbcea894f6264febc

mistral_lib/actions/context.py

@@ -103,4 +103,5 @@ class ActionContextSerializer(serialization.DictBasedSerializer):
             execution_ctx=ExecutionContext(**entity_dict['execution'])
         )
 
+
 serialization.register_serializer(ActionContext, ActionContextSerializer())

mistral_lib/actions/types.py

@@ -78,4 +78,5 @@ class ResultSerializer(serialization.DictBasedSerializer):
             entity_dict.get('cancel', False)
         )
 
+
 serialization.register_serializer(Result, ResultSerializer())

mistral_lib/utils/__init__.py

@@ -248,7 +248,7 @@ def cut_dict(d, length=100):
 
         idx += 1
 
-    if 0 <= length <= len(res) and res[length - 1] is not '}':
+    if 0 <= length <= len(res) and res[length - 1] != '}':
         res = res[:length - 3] + '...'
 
     return res
@@ -283,7 +283,7 @@ def cut_list(l, length=100):
             res += "'%s'" % s if is_str else s
         res += ', ' if idx < len(l) - 1 else ']'
 
-    if 0 <= length <= len(res) and res[length - 1] is not ']':
+    if 0 <= length <= len(res) and res[length - 1] != ']':
         res = res[:length - 3] + '...'
 
     return res

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=1.1.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 sphinx>=1.8.0,<2.0.0;python_version=='2.7' # BSD
 sphinx>=1.8.0,!=2.1.0;python_version>='3.4' # BSD

tox.ini

@@ -58,7 +58,7 @@ commands = oslo_debug_helper -t mistral_lib/tests {posargs}
 # E123, E125 skipped as they are invalid PEP-8.
 
 show-source = True
-ignore = E123,E125
+ignore = E123,E125,W504
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build