Kill reduce().  A coproduction of John Reese, Jacques Frechet, and Alex M.
diff --git a/Lib/idlelib/AutoCompleteWindow.py b/Lib/idlelib/AutoCompleteWindow.py
index d8bbff4..8bed034 100644
--- a/Lib/idlelib/AutoCompleteWindow.py
+++ b/Lib/idlelib/AutoCompleteWindow.py
@@ -335,10 +335,8 @@
             self.userwantswindow = True
             return
 
-        elif reduce(lambda x, y: x or y,
-                    [keysym.find(s) != -1 for s in ("Shift", "Control", "Alt",
-                                                    "Meta", "Command", "Option")
-                     ]):
+        elif any(s in keysym for s in ("Shift", "Control", "Alt",
+                                       "Meta", "Command", "Option")):
             # A modifier key, so ignore
             return