I have written a decorator module to make easier to write good decorators (i.e. decorators preserving the signature of the functions they decorate). The documentations contains a (hopefully) nice collections of use cases (which are also test cases, sice I take doctest very seriously ;). You can find it here: http://www.phyast.pitt.edu/~micheles/python/decorator.zip It is released under the Python licence. Let me know if you are using it and if you would like further additions/improvements/changes/etc. Feeback is welcome! Michele Simionato