--- a/light9/Effects.py	Mon Jun 18 01:34:40 2012 +0000
+++ b/light9/Effects.py	Mon Jun 18 04:51:08 2012 +0000
@@ -1,11 +1,13 @@
 from __future__ import division
 from random import Random
+import logging
 import light9.Submaster as Submaster
 from chase import chase as chase_logic
 import showconfig
 from rdflib import RDF
 from light9 import Patch
 from light9.namespaces import L9
+log = logging.getLogger()
 
 def chase(t, ontime=0.5, offset=0.2, onval=1.0, 
           offval=0.0, names=None, combiner=max, random=False):
@@ -22,8 +24,8 @@
         try:
             dmx = Patch.dmx_from_uri(uri)
         except KeyError:
-            print ("chase includes %r, which doesn't resolve to a dmx chan" %
-                   uri)
+            log.info(("chase includes %r, which doesn't resolve to a dmx chan" %
+                   uri))
             continue
         lev[dmx] = value
 
@@ -43,8 +45,8 @@
             try:
                 dmx = Patch.dmx_from_uri(uri)
             except KeyError:
-                print ("stack includes %r, which doesn't resolve to a dmx chan"%
-                       uri)
+                log.info(("stack includes %r, which doesn't resolve to a dmx chan"%
+                       uri))
                 continue
             lev[dmx] = 1
         else:

--- a/light9/curvecalc/subtermview.py	Mon Jun 18 01:34:40 2012 +0000
+++ b/light9/curvecalc/subtermview.py	Mon Jun 18 04:51:08 2012 +0000
@@ -1,9 +1,10 @@
-import gtk
+import gtk, logging
 from louie import dispatcher
 from rdflib import RDF, RDFS, Literal
 from light9 import Submaster
 from light9.namespaces import L9
 from light9.curvecalc.subterm import Subterm, Subexpr
+log = logging.getLogger()
 
 # inspired by http://www.daa.com.au/pipermail/pygtk/2008-August/015772.html
 # keeping a ref to the __dict__ of the object stops it from getting zeroed
@@ -30,7 +31,7 @@
                            sender=self.subexpr)
 
         dispatcher.connect(self.exprError, "expr_error", sender=self.subexpr)
-        print "made", id(self), self.__dict__
+        log.info("made %r %r" % (id(self), self.__dict__))
         keep.append(self.__dict__)
 
     def exprError(self, exc):
@@ -58,11 +59,11 @@
 
 def add_one_subterm(graph, subUri, curveset, subterms, master, expr=None, show=False):
     subname = graph.label(subUri)
-    print "%s's label is %s" % (subUri, subname)
+    log.info("%s's label is %s" % (subUri, subname))
     if not subname: # fake sub, like for a chase
         st = graph.subjects(L9['sub'], subUri).next()
         subname = graph.label(st)
-        print "using parent subterm's name instead. parent %r, name %r" % (st, subname)
+        log.info("using parent subterm's name instead. parent %r, name %r" % (st, subname))
     assert subname, "%s has no name" % subUri
     if expr is None:
         expr = '%s(t)' % subname
@@ -93,12 +94,12 @@
     
     vp = widgetInRow
     while vp.get_name() != 'GtkViewport':
-        print "walk", vp.get_name()
+        log.info("walk %s", vp.get_name())
         vp = vp.get_parent()
     adj = vp.props.vadjustment
 
     def firstExpose(widget, event, adj, widgetInRow):
-        print "scroll", adj.props.value
+        log.info("scroll %s", adj.props.value)
         adj.props.value = adj.props.upper
         widgetInRow.disconnect(handler)