huge cleanup for removing mutables used as default

[sfa.git] / sfa / rspecs / elements / versions / pgv2SliverType.py

diff --git a/sfa/rspecs/elements/versions/pgv2SliverType.py b/sfa/rspecs/elements/versions/pgv2SliverType.py
index 1f3ec0c..3ad687f 100644 (file)
--- a/sfa/rspecs/elements/versions/pgv2SliverType.py
+++ b/sfa/rspecs/elements/versions/pgv2SliverType.py
@@ -40,7 +40,8 @@ class PGv2SliverType:
                     for (key, value) in attrib_dict.items():
                         attrib_elem.set(key, value)                
     @staticmethod
-    def get_slivers(xml, filter={}):
+    def get_slivers(xml, filter=None):
+        if filter is None: filter={}
         xpath = './default:sliver_type | ./sliver_type'
         sliver_elems = xml.xpath(xpath)
         slivers = []
@@ -56,5 +57,6 @@ class PGv2SliverType:
         return slivers
 
     @staticmethod
-    def get_sliver_attributes(xml, filter={}):
+    def get_sliver_attributes(xml, filter=None):
+        if filter is None: filter={}
         return []