huge cleanup for removing mutables used as default

[sfa.git] / sfa / rspecs / elements / versions / pgv2Node.py

diff --git a/sfa/rspecs/elements/versions/pgv2Node.py b/sfa/rspecs/elements/versions/pgv2Node.py
index d553d21..60447b0 100644 (file)
--- a/sfa/rspecs/elements/versions/pgv2Node.py
+++ b/sfa/rspecs/elements/versions/pgv2Node.py
@@ -82,13 +82,15 @@ class PGv2Node:
 
 
     @staticmethod
-    def get_nodes(xml, filter={}):
+    def get_nodes(xml, filter=None):
+        if filter is None: filter={}
         xpath = '//node%s | //default:node%s' % (XpathFilter.xpath(filter), XpathFilter.xpath(filter))
         node_elems = xml.xpath(xpath)
         return PGv2Node.get_node_objs(node_elems)
 
     @staticmethod
-    def get_nodes_with_slivers(xml, filter={}):
+    def get_nodes_with_slivers(xml, filter=None):
+        if filter is None: filter={}
         xpath = '//node[count(sliver_type)>0] | //default:node[count(default:sliver_type) > 0]' 
         node_elems = xml.xpath(xpath)        
         return PGv2Node.get_node_objs(node_elems)