new dict support for commons

src/commons/__init__.py

@@ -1,6 +1,8 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 
+from . import dict
 from . import structures
 
+from .dict import dict_merge
 from .structures import Decimal

src/commons/dict.py

@@ -0,0 +1,13 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+def dict_merge(first, second):
+    result = dict()
+    for key, value in first.items():
+        if key in second:
+            is_dict = isinstance(second[key], dict)
+            if is_dict: result[key] = dict_merge(value, second.pop(key))
+        else:
+            result[key] = value
+    for key, value in second.items(): result[key] = value
+    return result