methods maybe static

Change-Id: I87b52c84c02b95c9317c1d122814ca0d1b84f27d

doc/source/index.rst

@@ -4,7 +4,7 @@
    contain the root `toctree` directive.
 
 Welcome to vitrage's documentation!
-========================================================
+===================================
 
 Contents:
 

vitrage/evaluator/scenario_repository.py

@@ -114,7 +114,8 @@ class ScenarioRepository(object):
         if not self.contains(scenarios, scenario):
             self.relationship_scenarios[key].append((edge_desc, scenario))
 
-    def _create_edge_scenario_key(self, edge_desc):
+    @staticmethod
+    def _create_edge_scenario_key(edge_desc):
 
         return EdgeKeyScenario(edge_desc.edge.label,
                                frozenset(edge_desc.source.properties.items()),

vitrage/evaluator/template.py

@@ -124,7 +124,8 @@ class Template(object):
         target = self.entities[target_id]
         return EdgeDescription(edge, source, target)
 
-    def _extract_properties(self, var_dict):
+    @staticmethod
+    def _extract_properties(var_dict):
 
         ignore_ids = [TFields.TEMPLATE_ID, TFields.SOURCE, TFields.TARGET]
         return dict((key, var_dict[key]) for key in var_dict
@@ -143,7 +144,8 @@ class Template(object):
 
         return scenarios
 
-    def _build_actions(self, actions_def):
+    @staticmethod
+    def _build_actions(actions_def):
 
         actions = []
         for action_def in actions_def:
@@ -187,7 +189,8 @@ class Template(object):
         if isinstance(condition_dnf, Symbol):
             return [[(self._extract_condition_var(condition_dnf, True))]]
 
-    def convert_to_dnf_format(self, condition_str):
+    @staticmethod
+    def convert_to_dnf_format(condition_str):
 
         condition_str = condition_str.replace('and', '&')
         condition_str = condition_str.replace('or', '|')

vitrage/tests/unit/entity_graph/processor/base.py

@@ -50,7 +50,8 @@ class TestBaseProcessor(TestEntityGraphUnitBase):
 
         return vertex
 
-    def _update_edge_to_graph(self, entity_graph, src_id, trgt_id, label):
+    @staticmethod
+    def _update_edge_to_graph(entity_graph, src_id, trgt_id, label):
         edge = graph.Edge(src_id, trgt_id, label, {})
         entity_graph.add_edge(edge)
         return edge