Use template to unify commands in functest/yardstick

JIRA: DOVETAIL-19

1. use jinja2 to unify commands in config files
2. it simplify the process of test execution, put the dissimilarity in config
3. add precondition/postcondition for functest/yardstick config

Change-Id: Ib996b11ea065b61910b34b78191bb7b1ffd92e59
Signed-off-by: Leo Wang <grakiss.wanglei@huawei.com>

1 files changed, 32 insertions, 1 deletions

diff --git a/scripts/utils/dovetail_utils.py b/scripts/utils/dovetail_utils.py
index f79c6fc4..4c671552 100644
--- a/scripts/utils/dovetail_utils.py
+++ b/scripts/utils/dovetail_utils.py
@@ -32,7 +32,7 @@ def exec_cmd(cmd, logger=None,
                          stderr=subprocess.STDOUT)
     output = p.communicate()
     for line in output[0].strip().split('\n'):
-        line = line.replace('\n', '') 
+        line = line.replace('\n', '')
         if logger:
             if info:
                 logger.info(line)
@@ -54,3 +54,34 @@ def exec_cmd(cmd, logger=None,
 
     return returncode, output[0].strip()
 
+
+#walkthrough the object, yield path and value
+from collections import Mapping, Set, Sequence
+
+# dual python 2/3 compatability, inspired by the "six" library
+string_types = (str, unicode) if str is bytes else (str, bytes)
+iteritems = lambda mapping: getattr(mapping, 'iteritems', mapping.items)()
+
+def objwalk(obj, path=(), memo=None):
+    if memo is None:
+        memo = set()
+    iterator = None
+    if isinstance(obj, Mapping):
+        iterator = iteritems
+    elif isinstance(obj, (Sequence, Set)) and not isinstance(obj, string_types):
+        iterator = enumerate
+    if iterator:
+        if id(obj) not in memo:
+            memo.add(id(obj))
+            for path_component, value in iterator(obj):
+                for result in objwalk(value, path + (path_component,), memo):
+                    yield result
+            memo.remove(id(obj))
+    else:
+        yield path, obj
+
+def get_obj_by_path(obj,dst_path):
+    for path, obj in objwalk(obj):
+        if path == dst_path:
+            return obj
+