huge cleanup for removing mutables used as default

[sfa.git] / sfa / rspecs / elements / versions / sfav1Sliver.py

diff --git a/sfa/rspecs/elements/versions/sfav1Sliver.py b/sfa/rspecs/elements/versions/sfav1Sliver.py
index a2b07a1..7e9282f 100644 (file)
--- a/sfa/rspecs/elements/versions/sfav1Sliver.py
+++ b/sfa/rspecs/elements/versions/sfav1Sliver.py
@@ -39,7 +39,8 @@ class SFAv1Sliver:
         return attribs 
                 
     @staticmethod
-    def get_slivers(xml, filter={}):
+    def get_slivers(xml, filter=None):
+        if filter is None: filter={}
         xpath = './default:sliver | ./sliver'
         sliver_elems = xml.xpath(xpath)
         slivers = []