diff -r 11df86fd2d67 -r 9f2967ba81ef pvl/rrd/api.py
--- a/pvl/rrd/api.py	Sun Jan 20 18:51:51 2013 +0200
+++ b/pvl/rrd/api.py	Sun Jan 20 19:52:41 2013 +0200
@@ -45,7 +45,7 @@
 
     return func(*(pre + opts + post))
 
-def graph (out=None, *args, **opts) :
+def graph (out=None, *defs, **opts) :
     """
         Render a graph image and/or print a report from data stored in one or several RRDs.
         
@@ -80,7 +80,7 @@
     log.debug("%s", out_path)
 
     # XXX: handle tempfile close?
-    width, height, out_lines = cmd(rrdtool.graph, (out_path, ), opts, args)
+    width, height, out_lines = cmd(rrdtool.graph, (out_path, ), opts, defs)
 
     if out_file is True :
         out_file = open(out_path)