diff --git a/op.py b/op.py
deleted file mode 100644
--- a/op.py
+++ /dev/null
@@ -1,31 +0,0 @@
-"""each node type has an Op within it"""
-
-class Op:
-    """nodes can have several versions of their operation function.
-
-    ops don't return anything! 
-    """
-    def __init__(self):
-        """This should not be overridden without being called."""
-        pass
-
-    def inputschanged(self, input, output, stateaccess):
-        """If you only define one op function body, make it this one. """
-        pass
-    
-    def created(self, input, output, stateaccess):
-        """This is called one time when the node is newly created. It's not called
-        when the node instance is pickled/unpickled. Use this version to initialize
-        state.
-        """        
-        # an extra call to changed() should help the outputs get set
-        # correctly before any real inputs-changed events come around
-        # (assuming this method doesn't get overridden with a
-        # specialized version)
-        self.inputschanged(input, output, stateaccess)        
-
-    def parameterschanged(self, input, output, stateaccess):
-        self.inputschanged(input, output, stateaccess)        
-
-    def clocked(self, input, output, stateaccess):
-        self.inputschanged(input, output, stateaccess)