support deepcopy on bson.SON

Author: RedBeard0531

bson/son.py

@@ -18,6 +18,7 @@
 of keys is important. A SON object can be used just like a normal Python
 dictionary."""
 
+import copy
 
 class SON(dict):
  """SON data.
@@ -202,3 +203,9 @@ def transform_value(value):
  return value
 
  return transform_value(dict(self))
+
+ def __deepcopy__(self, memo):
+ out = SON()
+ for k, v in self.iteritems():
+ out[k] = copy.deepcopy(v, memo)
+ return out