ofelia rspecs: default parameter for filter is None

[sfa.git] / sfa / rspecs / elements / versions / ofeliav1datapath.py

diff --git a/sfa/rspecs/elements/versions/ofeliav1datapath.py b/sfa/rspecs/elements/versions/ofeliav1datapath.py
index 86a3800..01390c0 100644 (file)
--- a/sfa/rspecs/elements/versions/ofeliav1datapath.py
+++ b/sfa/rspecs/elements/versions/ofeliav1datapath.py
@@ -21,7 +21,8 @@ from sfa.rspecs.elements.versions.ofeliav1Port import Ofeliav1Port
 class Ofeliav1Datapath:
 
     @staticmethod
-    def get_datapaths(xml, filter={}):
+    def get_datapaths(xml, filter=None):
+        if filter is None: filter = {}
         #xpath = '//datapath%s | //default:datapath%s' % (XpathFilter.xpath(filter), XpathFilter.xpath(filter))
         xpath = '//datapath%s | //openflow:datapath%s' % (XpathFilter.xpath(filter), XpathFilter.xpath(filter))
         datapath_elems = xml.xpath(xpath)