On Sun, 10 Feb 2008 08:46:24 +0100, David Trémouilles wrote: [snip] > I tried: > >>> map(not, boolean_list) > but it seems that "not" is not a function.
`not` is not a function, indeed. It is a keyword, allowing you to write ``not x`` instead of ``not(x)``. You can of course write a function that just returns its input negated and pass this function to `map`. Since Python comes with batteries included, there is such a function already in the `operator module <http://docs.python.org/lib/module-operator.html>`_:: import operator map(operator.not_, boolean_list) # ^ underscore to distinguish from the keyword Cheers, -- http://mail.python.org/mailman/listinfo/python-list
