X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sfa%2Frspecs%2Fversions%2Fnitosv1.py;fp=sfa%2Frspecs%2Fversions%2Fnitosv1.py;h=3288b48bb1f4ea33c987ef3d98c725f4130b2ae0;hb=d59f8e0b663b71d8c349017d0ecb37cb6bc527a1;hp=af60d8ed3c54a47b324ab745869a251984032139;hpb=3159d2c474d80bf0fb52040a0105a44f49314436;p=sfa.git

diff --git a/sfa/rspecs/versions/nitosv1.py b/sfa/rspecs/versions/nitosv1.py
index af60d8ed..3288b48b 100644
--- a/sfa/rspecs/versions/nitosv1.py
+++ b/sfa/rspecs/versions/nitosv1.py
@@ -60,7 +60,8 @@ class NITOSv1(RSpecVersion):
 
     # Slivers
    
-    def add_slivers(self, hostnames, attributes=[], sliver_urn=None, append=False):
+    def add_slivers(self, hostnames, attributes=None, sliver_urn=None, append=False):
+        if attributes is None: attributes=[]
         # add slice name to network tag
         network_tags = self.xml.xpath('//network')
         if network_tags: