On Thu, 15 Jul 2004, Andrew Koenig wrote: > [what I was trying to say, only better] :) Just a note: because Python sticks an implicit 'return None' at the end of a function, rather than returning the result of the last expression, like Scheme, you have to have an explicit return to see any effect: def traverse(t, f): if t: f(t) traverse(t.left) return traverse(t.right)
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